Alqamah narrates: A man came to Sayyiduna Abdullah (may Allah be pleased with him) and said: Tell us when the Prophet (peace and blessings be upon him) used to perform the witr. Sayyiduna Abdullah (may Allah be pleased with him) said: When about as much of the night remained as had passed of it, back to the Maghrib prayer. They asked about the recitation of the Prophet (peace and blessings be upon him), and Sayyiduna Abdullah (may Allah be pleased with him) said: It was loud enough that the people of the house would hear it.
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir; its chain contains a narrator, Ja'far bin Muhammad bin al-Hasan; I do not know him.