Sunan Abi Dawud 617
سنن أبي داود#617Da'ifNarrated Abdullah ibn Amr ibn al-'As: The Prophet (ﷺ) said: When the Imam completes the prayer and sits (for reciting tashahhud), and then becomes defiled (i.e. his ablution becomes void) before he speaks (to someone), his prayer becomes complete. And those who prayed behind him also complete the prayer
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniDaif
Muhammad Muhyi Al-Din Abdul HamidDaif
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 2:227