What did the Prophet Muhammad (saw) do with the knife after he was called to prayer?
 Narrated Umaiya Ad-Damri:                     I saw the Prophet eating of a shoulder (of a sheep) by cutting from it and then he was called to prayer and he prayed without repeating his ablution.Narrated Az-Zuhri:as above (Hadith No. 173...) and added that the Prophet put the knife down.