Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: One day the prayer was established, and a man came to the Prophet (peace and blessings of Allah be upon him) and spoke to him in a low voice about some need of his. This happened at night (and the conversation became so lengthy) that some of those present fell asleep.
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 2035
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» (198): ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما.