Sayyiduna Uqbah bin Amr Abu Mas'ud al-Ansari (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) prayed witr sometimes at the beginning of the night, sometimes in the middle, and sometimes at the end.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14751
Sayyiduna Uqbah bin Amr Abu Mas'ud al-Badri (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) used to pray witr at the beginning, the end and the middle of the night.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14752
Sayyiduna Uqbah bin Amr and Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with them both) both said: the Messenger of Allah (peace and blessings be upon him) would pray witr sometimes at the beginning of the night and sometimes in the middle, so that there would be latitude for the Muslims.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14753
It is narrated from Sayyiduna Uqbah bin Amr Abu Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to pray witr at the beginning, the middle and the end of the night.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14754