Quran 5:6 Wudu In A Madani Surah?
It is mentioned as a preamble to Tayammumm, a style of Quran to mention similar things along with others. as It mentioned the list of Muharramaat (women with whom marriage is not allowed) when it forbade marrying a women who was in marriage with one’s father. although it was well known who Muharramaat were.