Ata bin Saaib reported,

I came in to visit Abu Abdul-Rahman Sulami after he had prayed the dawn prayer, and he was sitting in his place of prayer. I said to him, "If you went to your bed, it would be more comfortable for you."He replied, "I heard Ali say that he heard the Messenger of Allah ﷺ say, 'Whoever prays the dawn prayer and then remains seated in his place of prayer, the angels send blessings upon him, and their blessing is, O Allah, forgive him. O Allah, have mercy on him. And whoever waits for the next prayer, the angels send blessings upon him, and their blessing is, O Allah, forgive him. O Allah, have mercy on him.'"

حدثنا حسين بن محمد حدثنا إسرائيل

عن عطاء بن السائب قال

دخلت على أبي عبد الرحمن السلمي وقد صلى الفجر وهو جالس في المجلس فقلت لو قمت إلى فراشك كان أوطأ لك فقال سمعت عليا رضي الله عنه يقول سمعت رسول الله ﷺ يقول من صلى الفجر ثم جلس في مصلاه صلت عليه الملائكة وصلاتهم عليه اللهم اغفر له اللهم ارحمه ومن ينتظر الصلاة صلت عليه الملائكة وصلاتهم عليه اللهم اغفر له اللهم ارحمه