During the dispute over Zamzam, Abdul Muttalib vowed that if Allah gave him ten sons to grow up and defend him, he would sacrifice one of them. Once his sons reached adulthood, he gathered them to fulfill the vow, and the lot fell upon his most beloved son, Abdullah, who was about 17 at the time. He brought Abdullah before the Ka'bah to carry out the sacrifice, but the Quraysh intervened, insisting he could not do this. They urged him instead to consult one of their priestesses to find a way out. She advised that lots be drawn between Abdullah and camels, ten at a time, until Allah was satisfied; the lot kept falling on Abdullah until the camels reached one hundred, at which point the lot fell on the camels instead, and Abdullah was ransomed.
Outcome: Abdullah was ransomed with one hundred camels after the lot repeatedly fell on him rather than the camels, up to that number.
Established 100 camels as the customary price of a life among the Arabs, later confirmed as the shari'ah amount of diyah (blood money) for manslaughter. Abdullah, the father of the Prophet Muhammad ﷺ, was spared to father him.
O Allah, if You give me ten sons who grow up to defend me, then I vow to sacrifice one of them for You.
Made amid the dispute over Zamzam, when war nearly broke out between Abdul Muttalib and his relatives over rights to the well.