It is narrated from Hazrat Aisha (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) used to perform two rak'ahs after the 'Isha prayer and then go to sleep. When he would wake up, the water for ablution would be covered and the miswak would be near him. He would use the miswak and perform ablution, and then pray eight rak'ahs. In these rak'ahs, he would not sit except after the eighth rak'ah, and he would remember Allah, praise Him, and supplicate to Him. Then he would stand up without saying salam, and perform the ninth rak'ah. Then he would sit, remember Allah, praise Him, and supplicate to Him, and then he would say salam, making the salam audible to us. After saying salam, he would pray two rak'ahs while sitting, so these became eleven rak'ahs. Then, when the age of Allah's Prophet (peace and blessings be upon him) increased and his blessed body became heavier, he started praying seven rak'ahs of witr, and two rak'ahs in the same manner as previously described, so these became nine rak'ahs, and the prayer of the Prophet (peace and blessings be upon him) remained like this until his passing. The previous hadith is also narrated from this second chain.