Bukhari Volume 7, Book 62, Number 16: Narrated Jabir bin Abdullah:

We returning from battle & When we were about to enter (Medina), the Prophet said, "Wait so that you may enter (Medina) at night so that the lady of unkempt hair may comb her hair and the one whose husband has been absent may shave her pubic region. [Pubic region = Area around reproduction organ of woman in which male penetrats his male organ to do sex)