Musannaf Ibn Abi Shaybah

Hazrat Sha’bah says that I asked Hazrat Hakam and Hazrat Hammad: If a drop of urine falls on the sock, what should be done? One said that in such a case, the prayer should be repeated, and the other said that there is no need to repeat the prayer.

Hazrat Aamir mentioned some people who did not repeat the prayer in case a drop of urine or blood touched them; among them was Abu Ja'far as well.

Ibrahim says that if a person, after performing prayer, sees a mark of feces or urine on his clothes or body, he should wash it and repeat the prayer. And if he sees a mark of semen or blood on his body, he should wash it but there is no need to repeat the prayer.