What is the ruling on the prayer of one who delays the ritual bath (ghusl) from major impurity (janabah) until after sunrise due to the unavailability of a vacant restroom at dawn?

You should have high aspirations in acts of obedience and in preparing for death. Prayer is light and illuminates the path, and it is the first thing a servant will be held accountable for. The remedy for sins is seeking forgiveness, repentance, performing good deeds, and supplicating to Allah. Means to pray early include sleeping early in a state of purity, avoiding sins, and reciting the prescribed supplications and remembrances. Whoever wakes up in a state of ritual impurity (junub) must perform ghusl (definition) (ritual bath) even if it leads to the prayer time expiring. It is not permissible to go back to sleep to avoid missing the prayer.