Muslims expected of the non Muslims to convert to Islam to prove that they are loyal subjects.
You can't prove to Muslims that they follow a false religion for one reason. The reason is that Islam not a false religion. There are many proofs that Islam is an authentic God religion and that Quran, Muslims holy book, is real God words revelation to prophet Muhammad through the angel Gabriel (Jibril).
In Mecca, Muslims prove their identity by performing the religious pilgrimage known as Hajj, which includes specific rituals and practices such as wearing special clothing, reciting prayers, and participating in symbolic acts of worship at holy sites. This pilgrimage is a requirement for all able-bodied Muslims at least once in their lifetime, and serves as a demonstration of their faith and commitment to Islam.
When Garvey tells Cole that he is going to prove his commitment, he means that Cole will need to show through his actions and behaviors that he is truly dedicated to changing and improving himself. This may involve taking responsibility for his mistakes, following through on his promises, and consistently working towards personal growth and transformation. Ultimately, proving his commitment will require Cole to demonstrate genuine effort and sincerity in his journey of self-discovery.
Greek boys went through the ceremony of Agoge before becoming men.
Even if they are Muslim by name, most likely not practicing Muslims as their songs and lyrics prove it all.
Juliet asks for Romeo to prove his love by making a sincere commitment to her through marriage. She wants him to solidify their relationship and show that his feelings are true and lasting.
The rehearsal for the wedding ceremony is tomorrow night. Are you wearing a cap and gown for your graduation ceremony? They've lived together for four years and say that they don't need any special ceremony to prove they're married. The Brownies will become Girl Scouts at a special "flying up" ceremony.
They were accepted at a meeting of their tribe as having met the requirements of citizenship.
You have to kill someone already in the club to take his place... and drink his blood to prove your commitment.
The trial done to become a Jedi included Trial of Revan where initiates were to prove their commitment to the Force.
It was different in different cities. In Sparta, the youth had to kill a helot with his bare hands.