(26) باب إِذَا لَمْ يُتِمَّ السُّجُودَ
Narrated Hudhaifa that he saw a person bowing and prostrating imperfectly. When he finished his Salat, Hudhaifa told him that he had not offered Salat. The subnarrator added, "I think that Hudhaifa also said:
Were you to die you would die on a "Sunna" (legal way) other than that of Muhammad (ﷺ)."
Reference: Sahih al-Bukhari 389
In-book reference: Book 8, Hadith 41
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 8, Hadith 385