the believers are those who believe in god and his messenger who do not change their belief into doubt and who strive hard for the cause of god with their property and persons. they are the truthful ones.
إنما المؤمنون الذين آمنوا بالله ورسوله ثم لم يرتابوا وجاهدوا بأموالهم وأنفسهم في سبيل الله أولئك هم الصادقون