It was narrated that Jabir bin 'Abdullah said: "Sulaik Ghatafani entered the Masjid when the Prophet P.B.U.H was delivering the sermon. He said: 'Have you prayed?' He said, 'No.' He said: 'Then perform two Rak'an:" (Sahih) As for' Arm (one of the narrator's of the Hadith), he did not mention Sulaik.