Hazrat Jabir bin Samurah narrates that the Holy Prophet (peace and blessings be upon him) sometimes offered the Isha prayer early and sometimes delayed it.

Hazrat Urwah narrates that the Holy Prophet (peace and blessings be upon him) used to offer the Isha prayer when the horizon would become dark, and sometimes he would delay it so that people could gather.

Hazrat Ibn Labeebah says that Hazrat Abu Hurairah said to me that offer the Isha prayer when the twilight disappears and before midnight when the darkness of the night increases. After the whiteness appears on the horizon, the sooner you offer it, the more virtuous it is.

Hazrat Urwah narrates that Hazrat Umar wrote a letter to Hazrat Abu Musa stating that perform the Isha prayer until one third of the night, or if you need to delay it further, then perform it until half of the night, and do not be among the heedless.

Hazrat Abdur Rahman bin Yazid narrates that Hazrat Abdullah bin Mas'ud (may Allah be pleased with him) used to offer the Isha prayer late.

Ibrahim says that the time for the Isha prayer is until a quarter of the night has passed.

Hazrat Amr bin Marwan says that I asked my father, "Have you offered prayer with Hazrat Ali (may Allah be pleased with him)? Tell me, at what time did he use to offer the Isha prayer?" He replied, "When the twilight would disappear."

Hazrat Mak’hool says that the time for Isha is until one third of the night; during this period, there is no allowance for sleep or negligence.

Hazrat Ibn Umar (may Allah be pleased with them both) narrates that one night we were waiting for the Messenger of Allah (peace and blessings be upon him) for the ‘Isha prayer. When a third of the night or a little more had passed, the Messenger of Allah (peace and blessings be upon him) came. I do not know whether something had held him back or he had some need among his family. He said,“I do not know of any followers of a religion, besides you, who wait for this prayer. If I did not fear hardship for my Ummah, I would have ordered them to perform this prayer at this time.”

It is narrated from Hazrat Abu Hurairah that the Messenger of Allah, peace and blessings be upon him, said: If I did not fear hardship for my ummah, I would have delayed the Isha prayer until one third or half of the night had passed.