Explanation

The Prophet (may Allah's peace and blessings be upon him) delayed the ‘Ishā' prayer until part of the night had passed and the women and children, who are likely unable to stay late at night, had gone to sleep. ‘Umar ibn al-Khattāb (may Allah be pleased with him) came to him and said: “Come to pray, for the women and children have slept.” The Prophet (may Allah's peace and blessings be upon him) came out of his home and went to the mosque while his head was dripping with water from the ritual bath and he said: "Had it not been hard for my Ummah, I would have commanded them to perform that prayer at this hour." This indicates that it would have been better to delay ‘Ishā' prayer were it not for the hardship that would result from waiting for such a long time.