In a Three or Four Rak’ah Prayer, When Does One Raise One’s Hands After Having Read the Tashahhud?
by The Albaani Blog
Questioner: In a three or four rak’ah prayer, does one raise one’s hands after the tashahhud when he intends to get up or after he [actually] gets up?
Al-Albaani: No, the first situation [that you mentioned is correct], when he is about to get up, not after it, before, when he intends to get up he says, “Allaahu Akbar,” and raises his hands.
Al-Hudaa wan-Noor, 134.