Sahih al-Bukhari
Sahih al-Bukhari 638
One should not stand for As-Salat (the prayer) hurriedly but with calmness and solemnity.
Arabic hadith text
حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا شَيْبَانُ، عَنْ يَحْيَى، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَتَادَةَ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم "إِذَا أُقِيمَتِ الصَّلاَةُ فَلاَ تَقُومُوا حَتَّى تَرَوْنِي وَعَلَيْكُمْ بِالسَّكِينَةِ ". تَابَعَهُ عَلِيُّ بْنُ الْمُبَارَكِ
Translation
Narrated `Abdullah bin Abi Qatada
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.' "