The Shaykh (may Allah have mercy on him) pointing out that the Sunnah for the one entering is to greet with a single greeting.

The questioner : Peace be upon you.

The Shaykh : And upon you be peace, and the mercy of Allah and His blessings. Welcome, welcome, how are you? It is perhaps good that I remind you before the opportunity is lost, because we were in the middle of a discussion. It is from the Sunnah, my brother, that when one enters a gathering, he should greet with a single greeting. Then, in a gathering like this, where the number is small, it is easy for you to shake hands, but you do not greet with the handshake and then offer a separate greeting, saying "Peace be upon you, peace be upon you." This is contrary to the Sunnah. You enter and say "Peace be upon you." Since the number is small and it is feasible, you shake their hands; this is undoubtedly better. As for when there is a crowded gathering, you say "Peace be upon you" and sit where the gathering ends for you, as you did just now. As for saying "Peace be upon you, peace be upon you," we call this an innovation of the last times. Let us return now...

The questioner : Not repeating it, meaning?

The Shaykh : Yes, well done!