Silsilah as-Sahihah 774 — Virtue of signaling according to Sunnah

Sayyiduna Uqbah bin Amir (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "When a person gestures with his hand in his prayer, ten good deeds are written for him in return, that is, for each finger, one good deed is given."