´Mansur reported from Al-Hakam, from Miqsam, from Ibn 'Abbas that Umm Salamah said:` "The Messenger of Allah (ﷺ) used to pray witr with seven or five (rak'ahs), not separating between them with the taslim."
Hadith ReferenceSunan an-Nasa'i / The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day / Hadith: 1716