The Messenger of Allah ﷺ said, "No group gathers to remember Allah but the angels surround them, mercy covers them, tranquility descends upon them, and Allah mentions them to those in His presence."He also said, "Allah grants respite until the last third of the night, when Allah descends to this lowest heaven and calls out, 'Is there any sinner seeking to repent? Is there anyone seeking forgiveness? Is there anyone making supplication? Is there anyone asking?' until dawn."
حدثنا عبد الرزاق أخبرنا معمر عن أبي إسحاق عن الأغر أبي مسلم
عن رسول الله ﷺ قال ما اجتمع قوم يذكرون الله إلا حفتهم الملائكة وتغشتهم الرحمة ونزلت عليهم السكينة وذكرهم الله فيمن عنده وقال إن الله يمهل حتى إذا كان ثلث الليل الآخر نزل الله عز وجل إلى هذه السماء فنادى هل من مذنب يتوب هل من مستغفر هل من داع هل من سائل إلى الفجر
Its isnad is sahih, mentioned shortly before, see 11226 and 11831m, and he said, "Allah grants respite until the last third of the night, then Allah descends to the lowest heaven and calls out, 'Is there anyone repenting so I may accept his repentance? Is there anyone seeking forgiveness? Is there anyone making supplication? Is there anyone asking for something?' until Fajr." Sahih (11831m). Its isnad is sahih, also mentioned before.