Sahih Muslim — Hadith #8948

It was narrated from 'Abdullah bin 'Amr that the Prophet (ﷺ) said:"When you pray Fajr, its time is until the first part of the sun appears. When you pray Zuhr, its time is until 'Asr comes. When you pray 'Asr, its time is until the sun turns yellow. When you pray Maghrib, its time is until the twilight has disappeared. When you pray 'Isha, its time is until half of the night has passed