Is earning from handball permissible or forbidden, and is it considered gambling, and what should be done with the money earned from it if it is forbidden, and is charity from it accepted, and what about the ruling on clothes bought with forbidden money and praying in them?

Playing handball is permissible as long as it does not involve any শরী‘আ-prohibited matters, such as the uncovering of 'awrah (private parts) or neglecting prayers. Receiving compensation for it is permissible if it is a gift from the state or the club. However, if it is from the competitors, then it is prohibited gambling (qimar). The Hadith (definition): "There is no prize except in hoof, or arrow, or foot" means that compensation in competitions is not permissible except in camel racing, horse racing, or archery. Money earned from handball is permissible if it is a gift, and unlawful if it is gambling. In this case, it must be returned to its owners or given in charity if they cannot be identified. The statement that the prayer of someone who wears something unlawful is invalid is incorrect; their prayer is valid, though they are sinful. As for the mentioned Hadith, it is weak, and even if it were authentic, what is negated is acceptance, not validity.