Muwatta Malik Book 7, Hadith 14
Yahya related to me from Malik from Yahya ibn Said from Muhammad
ibn Yahya ibn Habban from Ibn Muhayriz that a man from the Kinana
tribe called al-Mukhdaji heard a man in Syria known as Abu Muhammad
saying, "The witr is obligatory (fard)." Al-Mukhdaji said, "I went to
Ubada ibn as-Samit and presented myself to him as he was going to the
mosque, and told him what Abu Muhammad had said. Ubada said that Abu
Muhammad had lied and that he had heard the Messenger of Allah, may
Allah bless him and grant him peace, say, 'Allah the Majestic and
Mighty has written five prayers for mankind, and whoever does them and
does not waste anything of them by making light of what is due to
them, there is a pact for him with Allah that He will admit him into
the Garden.Whoever does not do them, there is no pact for him with
Allah. If He wishes, He punishes him, and if He wishes, He admits him
into the Garden.' "
Yahya related to me from Malik from Nafi and Abdullah ibn Umar that a man asked the Messenger of Allah, may Allah bless him and grant him peace, about night prayers. The Messenger of Allah, may Allah bless him and grant him peace, said, "Night prayers are two by two, and when you are afraid that dawn is approaching, pray one raka to make what you have prayed odd."
Yahya related to me from Malik from Abu Bakr ibn Umar that Said ibn Yasar said, ''I was travelling with Abdullah ibn Umar on the road to Makka, and fearing that it was nearly dawn. I dismounted and prayed witr. Abdullah said, 'Is there not a model for you in the Messenger of Allah, may Allah bless him and grant him peace?' I said, 'Of course, by Allah!' He said, 'The Messenger of Allah, may Allah bless him and grant him peace, used to pray witr on his camel.' "