(10) باب مَا يَقُولُ إِذَا دَخَلَ الْمَسْجِدَ
Abu Usaid reported that the Messenger of Allah (ﷺ) said:
When any one of you enters the mosque, he should say:" O Allah! open for me the doors of Thy mercy" ; and when he steps out he should say: 'O Allah! I beg of Thee Thy Grace." (Imam Muslim said: I heard Yahya saying: I transcribed this hadith from the compilation of Sulaiman b. Bilal.) (ES)
Reference (ES): Sahih Muslim 713 a (ES)
In-book reference (ES): Book 6, Hadith 82 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1538 (ES)