It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that Sulayk came while the Messenger of Allah (peace and blessings be upon him) was delivering the sermon. He sat down, so the Messenger of Allah (peace and blessings be upon him) ordered him to pray two light rak'ahs.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6669