Sayyiduna Ibn Umar (may Allah be pleased with them both) said: A man asked the Messenger of Allah (peace and blessings be upon him) about the night prayer (Tahajjud), so the Messenger of Allah (peace and blessings be upon him) said: “(It) is in sets of two rak‘ahs. When one of you fears that morning is approaching, let him pray one rak‘ah as Witr, and it will make all his prayer odd-numbered.”
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1498
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده قوي والحديث متفق عليه، [مكتبه الشامله نمبر: 1500]
Hadith Takhrijاس روایت کی سند قوی ہے اور حدیث متفق علیہ ہے۔ دیکھئے: [بخاري 472، 990] ، [مسلم 749] ، [أبوداؤد 1326] ، [نسائي 1693] ، [أبويعلی 2623] ، [ابن حبان 2426]