What is the concept of betrothal (khitbah) in Islam, and is the exchange of rings at the engagement party among the practices described by Sharia?

In Islamic law, khitbah (betrothal) is a man's proposal of marriage to a woman. It is legislated in Islam, and the Prophet, peace and blessings be upon him, encouraged looking at the prospective fiancée. There are no specific procedures for khitbah in Sharia, and the customs associated with it are permissible unless there is a Sharia text prohibiting them. Among these customs is the exchange of rings (dublah), which often involves violations: First, some people believe that it increases love, which is a pre-Islamic (Jahili) belief. Second, it involves imitating non-Muslims. Third, it usually occurs before the marriage contract (aqd), so it is not permissible for the suitor to put the ring on his fiancée's finger because she is still a non-mahram to him. Sheikh Ibn Uthaymeen indicated that the dublah becomes forbidden if it is accompanied by a belief that necessitates attachment, or if the suitor puts it on his fiancée's finger before the marriage contract.