Narrated Abu-Wail:
`Abdullah said, "One night I offered the Tahajjud prayer with the Prophet (ﷺ) and he kept on standing till an ill-thought came to me." We said, "What was the ill-thought?" He said, "It was to sit down and leave the Prophet (standing)."
Narrated `Aisha:
Allah's Messenger (ﷺ) offered witr prayer at different nights at various hours extending (from the `Isha' prayer) up to the last hour of the night.
Narrated Abu Jamra:
I asked Aidh bin `Amr, who was one of the companions of the Prophet (ﷺ) one of those (who gave the allegiance to the Prophet (ﷺ) the Tree: "Can the witr prayer be repeated (in one night)?" He said, "If you have offered it in the first part of the night, you should not repeat it in the last part 'of the night." (See Fath-ul-Bari page 458 Vol 8th).
Narrated `Aisha:
Allah's Messenger (ﷺ) used to pray two light rak`at before the morning (compulsory) prayer after the day dawned and the Mu'adh-dhin had finished his Adhan. He then would lie on his right side till the Mu'adh-dhin came to pronounce the Iqama.