Yahya related to me from Malik from Abd ar-Rahman ibn al-Mujabbarthat he used to see Salim ibn Abdullah pull the cloth away fiercelyfrom the mouth of any man he saw covering his mouth while praying. (IT)
App reference (IT): Book 1, Hadith 31 (IT)
USC-MSA web (English) reference: Book 1, Hadith 31 (IT)
Arabic reference (IT): Book 1, Hadith 32 (IT)