Sayyiduna Abu Ayyub Ansari (may Allah be pleased with him) narrates this statement of the Prophet (peace and blessings of Allah be upon him): "Witr is a right. Whoever wishes to perform five witr, let him perform them; and whoever wishes to perform three witr, let him perform them; and whoever wishes to perform one witr, let him perform it; and whoever is unable to perform them, let him perform them with gestures."
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 2411
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم، وهو مكرر الحديث (2407).