Sunan Abi Dawud 1017
سنن أبي داود#1017SahihIbn ‘Umar said :The Messenger of Allah (ﷺ) led us in prayer and gave the salutation after two rakahs of prayer. He narrated this tradition like that of Ibn Sirin from Abu Hurairah. This version adds; he gave the salutation and prostrated two prostrations due to forgetfulness
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 ZaiIsnaad Sahih
In-book reference: 2:628