Is it permissible to pay money to the tribal chief, which is collected for buying weapons and ammunition to slaughter sacrifices for the purpose of revenge, and what should an individual do if threatened or attacked for not paying?

A distinction must be made in tribal customs and rules of engagement between what violates Islamic law and what does not. The former is impermissible, while the ruling on the latter depends on its benefit, based on the Almighty's saying: {And cooperate in righteousness and piety} [Quran 5:2]. As for fighting between tribes, which often involves injustice and aggression, it is forbidden, especially with the existence of an authority to which one can refer, based on the hadith: "Whoever fights under a blind banner, becoming angry for partisanship, or calling to partisanship, or supporting partisanship, and is killed, then his death is a death of ignorance (Jahiliyyah)." Participation in such fighting is not permissible, neither with one's self nor with money, and those who call to it must be advised against it. Selling weapons to aggressors or instigators of strife is not permissible because it constitutes aiding in sin.

If the tribal chief insists on collecting money for fighting a tribulation, and threatens those who refuse, then his matter must be referred to the ruler. If this is not possible, it is better to endure injustice than to participate in the fighting, or to emigrate if possible, for the Prophet, peace be upon him, said: "Indeed, there will be tribulations; the one who sits during them is better than the one who walks in them." As for the money collected for sacrifices, hospitality, and cooperation in fulfilling obligatory rights such as blood money (Diyyat), it is commendable if the tribe members agree to it, as it is a form of cooperation and mutual support.