Riyad as-Salihin 1062
Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "The angels supplicate in favour of one of you so long as he remains in the place where he has performed Salat (prayer) in a state of Wudu'. They (the angels) say: 'O Allah! Forgive him, O Allah! Have mercy on him."' [Al- Bukhari] .
وعنه أن رسول الله صلى الله عليه وسلم قال‏:‏ الملائكة تصلي على أحدكم ما دام في مصلاه الذي صلى فيه ما لم يحدث تقول اللهم اغفر له اللهم ارحمه‏"‏ ‏(‏‏(‏رواه البخاري‏)‏‏)‏