صحیح ابن حبان
Ibn Hibban
كتاب الطهارة
Book of Purification
باب سنن الوضوء - ذكر الزجر عن إدخال المرء يده في الإناء في ابتداء الوضوء قبل غسلهما ثلاثا إذا كان مستيقظا من نومه
Chapter on the Sunnahs of Ablution - Warning against inserting the hand into the vessel before washing it three times after sleep
1 hadith
Hadith 1061
Sayyiduna Abu Huraira (may Allah be pleased with him) narrates: I heard the Prophet Muhammad (peace and blessings be upon him) say: "When any person wakes up from sleep, he should not put his hand into water until he has washed it three times. For no one knows where his hand spent the night."