"Ibn 'Umar said: The Prophet (ﷺ) entered the Masjid of Quba' to pray there, then some men came in and greeted him with Salam. I asked Suhaib, who was with him: 'What did the Messenger of Allah (ﷺ) do when he was greeted?' He said: 'He used to gesture with his hand.'"
Sunan an-Nasa'i Book 13, Hadith 9
← Previous Hadith "I passed by the Messenger of Allah (ﷺ) when he was praying, and greeted him with Salam. He returned my greeting with a gesture, or maybe it was just with his finger."

Sunan an-Nasa'i Book 13, Hadith 8 Next Hadith → He greeted the Messenger of Allah (ﷺ) with the Salam when he was praying, and he returned the greeting.

Sunan an-Nasa'i Book 13, Hadith 10