For a marriage to be valid certain conditions must be met.
1. Consent of both parties.
One of the conditions of a valid marriage is consent of the couple.
Marriage by definition is a voluntary union of two people.
There are many texts that support the couple in this sensitive issue, for example the report quoted by Imam Bukhari from al-Khansa’ bint Khidam:
“My father married me to his nephew, and I did not like this match, so I complained to the Messenger of Allah (Peace be upon him). He said to me: `Accept what your father has arranged.’ I said, `I do not wish to accept what my father has arranged.’ He said, `Then this marriage is invalid, go and marry whomever you wish.’ I said, `I have accepted what my father has arranged, but I wanted women to know that fathers have no right in their daughter’s matters (i.e. they have no right to force a marriage on them”
At first, the Prophet (Peace be upon him) told al-Khansa’ to obey her father, and this is as it should be, because the concern of fathers for their daughters’ well-being is well-known. But when he realized that her father wanted to force her into a marriage she did not want, he gave her the freedom to choose, and saved her from the oppression of a father who wanted to force her into an unwanted marriage.
Islam does not want to impose an unbearable burden man or woman by forcing them to marry someone whom they dislike, because it wants marriages to be successful, based on compatibility between the partners; there should be common ground between them in terms of physical looks, attitudes, habits, inclinations and aspirations.
2. “Mahr” a gift from the groom to his bride.
Mahr is the gift that is given by the husband to his wife at wedding. It can be anything in any amount, as agreed by the bride and bride-groom. Allah says about Mahr in the Chapter `Woman’ in Quran:
And give the women (on marriage) their Mahr as a free gift .. [Quran 4:4]
But if you had given the latter a cantar (of gold i.e. a great amount) for dower (Mahr) take not the least bit of it back … [Quran 4:20]