The best way to call those who do not pray and to deal with innovators

Their father tells them to pray and adhere to the teachings of Islam but he does not pray

He delayed the prayer until the time for it was over with no excuse; does he have to do ghusl?

He does not pray and he lives with his girlfriend; he wants to repent and marry her

Is work one of the excuses for which it is permissible to delay prayer beyond its time?

Doing righteous deeds when one is careless about prayer

His boss doesn’t let him pray

He hears the call to prayer but he does not respond

Ruling on marriage contract with one who was not praying then Allaah guided him

He goes back to sleep after waking without praying