(19) باب مَا جَاءَ فِي الصَّلاَةِ عِنْدَ دُخُولِ الْمَسْجِدِ
Abu Qatadah reported the Messenger of Allah (May peace be upon him) as saying; when any one of you enters the mosque, he should pray two RAKAHS before sitting down. (ES)
Reference (ES): Sunan Abi Dawud 467 (ES)
In-book reference (ES): Book 2, Hadith 77 (ES)
English translation (ES): Book 2, Hadith 467 (ES)