It was narrated that Muhammad bin Sad bin Abi Waqqas said: "The Messenger of Allah said: 'The month is like this and like this and like this." (One of the narrators) Muhammad bin 'Ubaid clapped his hands three time to demonstrate it, then he withheld his left thumb the third time. Yahya bin Saeed said to Ismail (One of the narrators): "Form his father?' He said: "No."