Musannaf Ibn Abi Shaybah 9045 — Those who said: the twilight

Ja'far bin Burqan said: Umar bin Abd al-Aziz wrote to us: Pray Maghrib at the time when the fasting person breaks his fast. Then he said: There are some people who pray Isha before the whiteness of the horizon has gone. Do not pray Isha until the whiteness of the horizon on the western side has gone and the darkness of night has covered it. Whatever you hasten after the whiteness of the horizon on the western side has gone is better and more correct. And know that the completeness of the prayer and hitting its proper time lie in what I have mentioned to you in my letter, namely the time after the whiteness of the horizon has gone, for that whiteness is a remnant of what remains of the day.