Abu Qatadah (May Allah be pleased with him)reported:
The Messenger of Allah (ﷺ) said, "When anyone of you enters the mosque, he should perform two Rak'ah (of voluntary prayer) before sitting."[Al-Bukhari and Muslim]. (DE)
App reference (DE): Book 9, Hadith 154 (DE)
Arabic/English book reference (DE): Book 9, Hadith 1144 (DE)