Is it permissible to delay the Isha prayer past the time of the Adhan and perform it in congregation at the mosque after finishing playing football, even if doing so means missing the first congregational prayer?

It is better for worshipers to hasten to pray at the beginning of the time with the regular Imam to increase the reward of congregational prayer. The greater the number of worshipers, the greater the reward, according to the Prophet, peace and blessings be upon him: "A man's prayer with another man is purer than his prayer alone, and his prayer with two men is purer than his prayer with one man, and what is more numerous is more beloved to Allah Almighty." The principle is that only one congregation should be established in a mosque, but they are permitted to delay and pray in congregation as long as the time has not expired.