[Machine] Bilal used to call for prayer (adhan) when sunrise came, but he wouldn't establish (i.e., start) the prayer until he saw the Prophet ﷺ . When he (Bilal) saw him (the Prophet), he would establish the prayer.
كَانَ بِلَالٌ يُؤَذِّنُ إِذَا دَحَضَتْ ثُمَّ لَا يُقِيمُ حَتَّى يَرَى النَّبِيَّ ﷺ فَإِذَا رَآهُ أَقَامَ حِينَ يَرَاهُ