Sa‘d saw the attacks by a horseman and said...
Sa‘d saw the attacks by a horseman and said, "The jumps is similar to the jumps (my stead) Balga and the attack by spear is similar to the attack of Abu Mehjan, except that Abu Mehjan is locked up." When the enemy was defeated, Abu Mehjan came back. They put the chains on his hands and feet. Sa‘d's wife told Sa‘d the story of Abu Mehjan. Then Sa‘d said, "By God I will not punish the man for drinking while he brought victory to Muslims." He then ordered Abu Mehjan to be freed.
Abu Mehjan said, "I used to take the punishment as a penance, now that you do not punish me I will drink no more. Saif’s Narration Tabari in vol.3, p.43 says that Sa‘d imprisoned those men who drank wine and caused trouble. Sa‘d insulted them by saying, "If we were not in the battle-field I would teach you a lesson that others might learn from it." Abu Mehjan was one of them whose hands and feet were chained.
Tabari in vol.3, pp.55-57 says that after Sa‘d's wife set Abu Mehjan free and he fought the enemy he came back to the prison, and they chained him. Sa‘d's wife asked Abu Mehjan why he was in prison? He said, "I used to drink wine before I embraced Islam. Now I compose verses admiring wine.
Sa‘d does not like it so he imprisons me." Salma told her husband Sa‘d what Abu Mehjan had said, so Sa‘d freed him from prison, and said to him, "I will not punish you for just talking about a crime." Abu Mehjan swore that he would not say things that were not good. Abulfaraj in al-Aghani, vol.21, has recorded this story narrated by Saif from Tabari.
Ibn Hajar in al-Esaba, vol.4, p.175 says that Ibn Fathoun had criticized Abu ‘Amr who had written in Esti‘ab (as mentioned before) that Abu Mehjan was always drunk. It was enough to say that he was punished for drinking. It would be better to say that which Saif has recorded.
Ibn Hajar then continues saying, "Saif is weak (not reliable) but what we have written is stronger and well known." Ibn Fathoun denies that Sa‘d neglected to punish any drunkard, and he changed what Sa‘d said, "I will not punish Abu Mehjan for drinking," to "Abu Mehjan will not drink anymore to be punished." Mas‘oudi in vol.2, pp.422-424 Morouj al-dhahab has quoted what Saif has narrated without mentioning Saif's name.
But we know Mas‘oudi has recorded from Tabari as he greatly praised Tabari at the beginning of his book. Origin of Saif's story Saif has recorded this story from Muhammad, Talha, Ziad and Bin Mihraq.