Sunan Ibn Majah Book 5, Hadith 161
“The Messenger of
Allah (ﷺ) said: ‘Do not bow or prostrate before me. No matter how
far ahead of you I bow, you will catch up with me when I stand up,
and
no matter how far ahead of you I prostrate, you will catch up
with me
when I raise my head. I have become bulky.’”
“The Messenger of Allah (ﷺ) said: ‘I have gained weight, so when I bow, then bow, and when I stand up, then stand up, and when I prostrate, then prostrate. I should never find anyone preceding me in bowing or prostration.’”
“It is impolite for a man to wipe his forehead a great deal before he finishes prayer.”