Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) said:“There are three things that are obligatory upon me and are voluntary (nafl) for you: offering the sacrifice (qurbani), performing the Witr prayer, and performing the two Sunnah rak‘ahs of Fajr.”

Sayyiduna Anas (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "I have been commanded to perform the Witr prayer and to offer sacrifice, and I have not been made obligated to do so."

Saeed bin Yasar reports: I was traveling with Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) on the way to Makkah. When I feared that dawn was about to break, I got down from my mount and performed the Witr prayer. Then I met Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), and he asked me: "Where were you?" I replied: "I feared that dawn would break, so I got down from my mount and performed the Witr prayer." Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) asked: "Is it not sufficient for you to follow Allah's Messenger (peace and blessings be upon him)?" I replied: "Of course, it is." He then said: "Allah's Messenger (peace and blessings be upon him) used to perform Witr on his camel."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates about the Noble Prophet (peace and blessings be upon him): "The Prophet (peace and blessings be upon him) would perform voluntary prayers on top of his mount, regardless of which direction it was facing, and he (peace and blessings be upon him) would gesture with his head (for bowing and prostration)."

It is narrated about Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he used to perform the Witr prayer on his mount, and he mentioned regarding the Noble Prophet (peace and blessings be upon him) that the Noble Prophet (peace and blessings be upon him) used to do the same.

Saeed bin Jubair narrates: Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) used to perform voluntary prayers on his mount, but when he had to perform Witr, he would dismount and perform Witr. Nafi' narrates: Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) would sometimes perform Witr on his mount and sometimes dismount and then perform Witr.