The pre-Islamic practice of shigar which was abolished by Islam meant

The pre-Islamic practice of shigar was a custom that involved the exchange of sisters in wedlock between two different families or tribes. Essentially, this meant that a man from one family would marry a woman from another family, and in exchange, his sister would be married to a man from the other family. This practice was seen as a way to strengthen ties between the two families or tribes, but it was also seen as a form of exploitation and a violation of women's rights. Islam abolished this practice because it was considered to be unfair and demeaning to women. Instead, Islam emphasized the importance of free choice and consent in marriage, and encouraged marriages based on love, mutual respect, and shared values. In Islamic tradition, marriage is seen as a sacred and joyful union between two people who choose to be together, and the practice of shigar is no longer considered to be a legitimate or acceptable form of marriage.