In the Indian Muslim Traditions, specially in Gangatic plains and Hyderabad (Deccan). There is a social ritual where the sisters of the groom sing a song in praise of the groom and pray to God for his future wedded life. And this follows up with the groom giving cash to his sisters.
There are no specification for a sehra except that it should rhyme and be of the same meter. Sehras are generally written by individuals praising their brothers, so they are very varied in style and nature. A good sehra appears in the Urdu Film Razia Sultan, however this particular sehra was sung by males, quite contrary to the current tradition.