I say, and with God's success: It starts from the sunset of twilight until the dawn rises, and the Witr prayer should not be performed before the Isha prayer; due to the necessity of order, not because the time for Witr has not entered; for Abu Huraira reported that the Messenger of Allah said: "Indeed, for prayer, there is a beginning and an end. The first time for the Dhuhr prayer is when the sun has passed its zenith, and its last time is when the time for Asr enters. The first time for the Asr prayer is when its time enters, and its last time is when the sun turns yellow. The first time for Maghrib is when the sun sets, and its last time is when the horizon disappears. The first time for the Isha prayer is when the horizon disappears, and its last time is when midnight occurs. The first time for Fajr is when dawn breaks, and its last time is when the sun rises." This is found in Sunan al-Tirmidhi 1: 284, and its narrators are the narrators of the group except for Hanad, as mentioned in I'la al-Sunan 2: 10.