Call to Prayers (Adhaan)
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا هِشَامٌ، قَالَ كَتَبَ إِلَىَّ يَحْيَى عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَتَادَةَ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا أُقِيمَتِ الصَّلاَةُ فَلاَ تَقُومُوا حَتَّى تَرَوْنِي ".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)
From Sahih al-Bukhari, whose reports the scholars accept as authentic.