Sahih al-Bukhari Book 10, Hadith 34
My father said. "Allah's Messenger (ﷺ) said, 'If the Iqama is pronounced then do not stand for the prayer till
you see me (in front of you).' "
The Prophet (ﷺ) said, "When you hear the Iqama, proceed to offer the prayer with calmness and solemnity and do not make haste. And pray whatever you are able to pray and complete whatever you have missed.
My father said, "Allah's Messenger (ﷺ) said, 'If the Iqama is pronounced, then do not stand for the prayer till you see me (in front of you) and do it calmly.' "