Sunan Abi Dawud 469
سنن أبي داود#469SahihAbu Hurairah reported the Messenger of Allah (May peace be upon him) as saying; The angels invoke blessings on any of you who remains sitting at the place where he says his prayers so long as he is defiled (needs ablution) or stands up, saying:O Allah, forgives him; O Allah, have mercy on him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (445)
In-book reference: 2:79