From Sahih Bukhari (Hadith 1076):
Narrated Ibn `Umar:When the Prophet (ﷺ) recited Surat As-Sajda and we were with him, he would prostrate and we also would prostrate with him and some of us (because of the heavy rush) would not find a place (for our foreheads) to prostrate on
Reference: Bukhari 1076