Musannaf Ibn Abi Shaybah

Hasan says that if after performing the last prostration someone has a nosebleed, he should go and perform ablution, then return and if he has not spoken to anyone, he should recite the Tashahhud, and if he has spoken to someone, he should repeat the prayer.

Hazrat Ata also says the same.

Hazrat Ibn Sirin says that if ablution breaks before saying salam, the prayer is not complete.

Hazrat Ata says that if after saying "As-salamu 'alayna wa 'ala 'ibadillahis-saliheen" in Tashahhud, the ablution breaks, then his prayer is complete.

Hazrat Hakam and Hazrat Hammad state that until a person recites the Tashahhud or sits for the duration of the Tashahhud, the prayer is not complete.

Hazrat Mak’hool says that if a person experiences hadath (minor impurity) after reciting the Tashahhud, his prayer will be considered complete.