ANSWER:
If he has committed himself and accepted such conditions, he must honor them even if they were not written because the prophet salla allahu alaihi wa sallam had said: the Muslims are bound by the conditions.
ANSWER:
If he has committed himself and accepted such conditions, he must honor them even if they were not written because the prophet salla allahu alaihi wa sallam had said: the Muslims are bound by the conditions.