Riyad as-SalihinChapter 8Hadith 489
Full Sharh — Riyad as-Salihin 489
وعن ابن عمر رضي الله عنهما، أن النبي صلى الله عليه وسلم ، قال: "صلاة الليل مثنى مثنى، فإذا خفت الصبح فأوتر بواحدة". ((متفق عليه)) .
English Translation
Ibn 'Umar (May Allah be pleased with them) reported:: The Prophet (ﷺ) said, "Salat during the night should consist of pairs of but if you fear that morning is near, then pray one Rak'ah as Witr.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Virtues
Hadith Number
489