Yahya ibn Hamzah said, “A man from the Banu Makhzum, one of the descendants of al-Harith ibn Hisham, related to me. He said: Abu al-Zinad narrated to me, from al-Aʿraj, from Abu Hurayrah, that the Messenger of Allah ﷺ said, ‘There is to be neither jalab nor janab; and if the two contestants do not introduce a third horse against which both animals race for the stake, the wager is forbidden.’ (1)

They say: This chain of transmission needs no further inquiry regarding its narrators, and the most that can be said about the unidentified man is that he is unnamed; by his presence the report becomes mursal. When, however, it is coupled with the two preceding ḥadiths, its authority is thereby strengthened and it is suitable for corroboration, though not for independent reliance. (2) (3)

Section
The fourth proof is what al-Saʿdī also reported from ʿAmr ibn ʿĀṣim: Hammād narrated to us, from ʿAlī ibn Zayd, from Saʿīd ibn al-Musayyib, that two men, while in a state of consecration, gambled over a gazelle—each staking on which of them would reach it first. One of them outpaced the other, whereupon ʿUmar said, “This is gambling, and we do not permit it.” (4)