Sahih Muslim | Book 3 | Chapter 32

Narrated by Anas
Anas reported: (The people) stood up for prayer and the Messenger of Allah (may peace be upon him) was whispering to a man, and in the narration of 'Abd al-Warith (the words are): The Apostle of Allah (may peace be upon him) was having a private conversation with a man, and did not start the prayer till the people dozed off.

Narrated by Anas b. Malik
Anas b. Malik reported: (The people) stood up for prayer and the Apostle of Allah (may peace be upon him) was talking in whispers with a man, and he did not discontinue the conversation till his Companions dozed off; he then came and led the prayer.

Narrated by Qatida
Qatida reported: I heard Anas as saying that the Companion of the Messenger of Allah (may peace be upon him) dozed off and then offered prayer and did not perform ablution. He (the narrator) said: I asked him if he had actually heard it from Anas. He said: By Allah. yes.

Narrated by Anas
Anas reported: (The people) stood up for the night prayer when a man spoke forth: I need to say something. The Apostle of Allah (may peace be upon him) entered into secret conversation with him, till the people dozed off or some of the people (dozed off), and then they said the prayer.