Hadith 1375
افضل الرباط الصلاة ولزوم مجالس الذكر وما من عبد يصلي ثم يقعد فى مصلاه الا لم تزل الملائكة تصلي عليه حتي يحدث أو يقوم
"The best form of guarding (i.e., keeping watch) is adherence to prayer and gatherings of remembrance, and whoever, after performing prayer, remains seated at the place of prayer, as long as he does not lose his ablution or stand up, the angels continue to pray for mercy upon him."
