Sayiduna Limamu (P.B.O.H.) performed this miraculous act to show that he was endowed by his creator with extraordinary gifts. He could make a great scholar forget all his science at once by just blowing in his direction or in reverse he could inspire unlimited science to an ignorant as he did to his son.
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Missions abroad and in the country
During a number of missions which he was sent on in the country and abroad in Europe he showed some of the extraordinary gifts that his father had continued to inspire to him until his death in 1909.
When the first world war began Sayiduna Issa Ruhu Lahi who was then caliph  was compelled by the French colonial authorities, as they did to all religious families, to send a son to enlist into the colonial corps of their army. Sayiduna Mandione Lahi was to go, but  Ababacar Lahi only 19 years old volunteered to go in his place. So he joined the army with other young men from different religious families. In spite of his young age he did heroic acts during the battles in Europe.
It is related that one day when he was with a group of soldiers they were surrounded by  German enemies and had no issue to escape through. Ababacar then performed a miraculous act which saved  him and his companions. He told them to stand on a line one behind another, put their hands on each other’s shoulder and close their eyes. He told them not open their eyes while he recited a prayer. When he finished and they opened their eyes they found themselves in another place far from the Germans .
It is related also that he once led prayers wearing magnificent clothes and no one knew where they came from.
When he was freed from the army after the war he returned to the service of his brothers and devoted himself to it altogether. Despite all the mystic powers that his father had inherited from his father and the favours that God had given him he always showed his disposal to act as a true disciple of Sayidina Limamu Lahi (P.B.O.H ) and his readiness to help people in Yoff and around. He always said:                 «  I ,Babacar have no disciple ».
He was often sent on missions by his brothers to other religious leaders in the country. In 1958 he led a delegation to Touba  to present condolences to Serigne Falilu Mbacke when his son Abdul Karim died.
That predestined delegation travelled on a train with three carriages and included three women exactly as Serigne Touba had foretold long before his death. The three carriages symbolised the three virtues of true Muslim : Iman (faith in God), Islam (submission to God) and Ihsan (permanent righteousness ).
 He made a second visit to Touba when Serigne Falilu invited him and presented him with a prayer mat  which had belonged to Serigne Touba . That was meant as a symbol sealing the alliance between the two  families.
He also paid a visit to Al Hassan Ngom in Bargny. On that occasion he showed his healing powers when a man possessed by the devil was brought to him . He healed him at once without asking any fees   for it.
His mystic powers were well-known; people came to him at any time, day and night, to seek his help and they always got satisfaction with the help of God.
He was even said to have resuscitated a dead man. Sokhna Binta Ka and Mamadu Diop living in Yoff  witnessed it.
In 1909, the last year of Sayidina Issa Ruhu Lahi’s caliphate he spent six months in Camberene serving his brother . That year he led the Nafila prayers during the whole Ramadan month .
In 1965, one year before his death, he led the end of Ramadan prayer in Diamalaye as the Caliph  Sayiduna Mandione was unable to do it. It was a farewell prayer .
In all his missions Sayiduna Ababacar’s main concern was to prove that his father was the Promised Mahdi whom the Muslim world was awaiting. Indeed his life proved also that he was a  model disciple whose duty was to help people in need, whichever religious sect they belonged to. It was a heritage from his father Sayidina Limamu (P.B.O.H.), along with the great favours that God had given him.
He had physical resemblances with his father such as his voice which sounded like the sea waves and  his features . He was considered as the true copy of his father. But God decreed that he would not be his caliph . He joined his illustrious father on a rainy day on the 27th day of Jumada al thani 1966 .He was buried near his father in Diamalaye.
In his book Macalou makes a reference to Ibn Sirine’s interpretation of dreams in which the Prophet (P.B.O.H.) is quoted saying : « I saw myself in a dream standing by a well and drawing water for a flock of black sheep  then Abubakr took the bucket, let it down into the well once or twice but was not strong enough to pull it out. » This hadith shows that Mame Babacar Lahi’s destiny had been sealed long before. He would not be able to bring water to the black sheep of the Prophet’s (P.B.O.H.) second mission as Mahdi.
A model head of family
He stood as a model for heads of families in Yoff. He took much care for the education of his children. He hired teachers to teach  them  the basics of Islam and the Quran. He took care of the other children living in his house as well as his own children and satisfied them in all their needs.
He personally took an active part in cultivating his farming plot which was on the site occupied now by the cultural center of Yoff .
Fishermen , even those who were his detractors, came to him when their capture became rare to get his prayers. His heart overflowed with generosity
In Sayidina Limamu Lahi’s (P.B.O.H.) family, each son had a precise mission to fulfil. Mame Mbaye Lahi’s mission was twofold; on one hand to confirm his  father’s divine mission and the immense powers that God had given him  and on the other hand to stand for the Umma as a model of true disciple of the Mahdi (P.B.O.H.). His death was a loss for all the Muslim Umma for he was an example for all Muslims in the world . The exceptional example of a man whose life was relatively short but was full of spirituality, simplicity and generosity,  whose only ambition was to get the Almighty’s satisfaction and never sought material reward from men.