Riyad as-Salihin — Hadith #38986

And on the authority of Ibn Omar, may God be pleased with them both, that the Messenger of God, may God bless him and grant him peace, said: “If there are three, then two should not talk to each other without the third” ((Agreed upon)). ((It was narrated by Abu Dawad and added: Abu Salih said: I said to Ibn Omar: So four? He said: It will not harm you. Malik narrated it in Al-Muwatta’: On the authority of Abdul Allah bin Dinar said: I and Ibn Omar were at the house of Khalid bin Uqba, which is in the market, and he came A man wanted to talk to him, and there was no one with Ibn Umar except me. So Ibn Umar called another man until we were four, and he said to me and the third man who called: Delay something, for I heard the Messenger of God, may God bless him and grant him peace, say: “Two should not talk to each other without one.”