Abu Amr al-Shaybani says: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to make rounds in the mosque, and whomever he found he would put out, except for someone who was praying.
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators have been deemed trustworthy (muwaththaq).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2038