Surah 2. Al-Baqara, Ayah 236

The term faridah denotes the dower (often also called mahr) which must be agreed upon by bridegroom and bride before the conclusion of the marriage-tie. While the amount of this dower is left to the discretion of the two contracting parties (and may even consist of no more than a token gift), its stipulation is an essential part of an Islamic marriage contract. For exceptions from this rule, see 33:50 and the corresponding note [58].

Lit., "upon the doers of good" - i.e., all who are determined to act in accordance with God's will.