When 'Abdullah bin Salâm heard of the arrival of the Prophet (ﷺ) at Al-Madîna, he came to him and said, I am going to ask you about three things which nobody knows except a Prophet (ﷺ):
(1) What is the first portent of the Hour?
(2) What will be the first meal taken by the people of Paradise?
(3) Why does a child resemble its father, and why does it resemble its maternal uncle?"
Allâh's Messenger (ﷺ) said, "Jibrael (Gabriel) has just now told me of their answers." 'Abdullâh said, "He [i.e. Jibrael (Gabriel)], from amongst all the angels, is the enemy of the Jews." Allah's Messenger (ﷺ) said, "The first portent of the Hour will be a fire that will collect the people from the east to the west; the first meal of the people of Paradise will be extra lobe (caudate lobe) of fish-liver. As for the resemblance of the child to its parents: If a man has sexual intercourse with his wife and gets discharge first, the child will resemble the father, and if the woman gets discharge first, the child will resemble her." On that 'Abdullâh bin Salâm said, "I testify that you are the Messenger of Allâh."
'Abdullah bin Salâm further said, "O Allâh's Messenger (ﷺ)! The Jews are liars, and if they should come to know about my conversion to Islâm before you ask them (about me), they would tell a lie about me." " The Jews came to Allâh's Messenger (ﷺ) and 'Abdullâh went inside the house. Allâh's Messenger (ﷺ) asked (the Jews), "What kind of man is 'Abdullah bin Salâm amongst you? They replied, "He is the most learned person amongst us, and the best amongst us, and the son of the best amongst us. Allâh's Messenger (ﷺ) said, "What do you think if he embraces Islâm?" The Jews said, "May Allâh save him from it."
Then 'Abdullah bin Salâm came out in front of them saying, "I testify that La ilâha ill-Allâh (none has the right to be worshipped but Allâh) and Muḥammad is the Messenger of Allâh." Thereupon they said, "He is the most wicked among us, and the son of the most wicked amongst us, "and continued talking badly of him. [4:546-O.B]