Hazrat Masruq narrates that I asked Hazrat Aisha (may Allah be pleased with her) about the Witr prayer of the Prophet (peace and blessings be upon him), so she replied that the Prophet (peace and blessings be upon him) offered the Witr prayer in every part of the night: in the early part, in the middle part, and before dawn at the time of suhoor before the pre-dawn meal.

It is narrated similarly through another chain.

Hazrat Alqamah narrates that I have performed the Witr prayer with Hazrat Abdullah in every part of the night. He would raise his voice in recitation to such an extent that everyone present in the mosque could hear. He would recite with measured pace and would not repeat the recitation. He would perform the Witr prayer for a duration equal to the time from the Maghrib call to prayer until the completion of the prayer, before the dawn of Fajr.

Hazrat Abdullah says that Witr is between two prayers.

Ibn Aun says that I asked Shabi, "What is the best time to perform Witr?" He said, "When the caller to prayer stretches his neck and moves his head during the call to prayer."

Ibrahim says that I asked Ubaidah about a person who wakes up at the time of iqamah; should he perform witr? He replied that yes, he should perform witr at that time.

Hazrat Ali (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) performed Witr in every part of the night: at the beginning, in the middle, and at the end. However, the Prophet (peace and blessings be upon him) most frequently performed Witr in the last part of the night.

Hazrat Ibn Abbas (may Allah be pleased with both of them) used to offer Witr at that time of the night when as much of the night remained as had passed since the Maghrib prayer until then.

Hazrat Amr bin Shurahbil says that Hazrat Abdullah was asked about offering Witr after the Adhan, so he replied that yes, Witr can be offered after the Adhan and also after the Iqamah.

Hazrat Hakeem bin Jabir narrates that Hazrat Abu Maisarah used to lead his people in prayer. Once he was late. He said that I was offering Witr.