(48) باب طُولِ النَّجْوَى
Narrated Anas:
The Iqama for the prayer was announced while a man was talking to Allah's Messenger (ﷺ) privately. He continued talking in that way till the Prophet's companions slept, and afterwards the Prophet (ﷺ) got up and offered the prayer with them.
Reference: Sahih al-Bukhari 6292
In-book reference: Book 79, Hadith 64
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 74, Hadith 307