261. hadíth
وَقَالَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ: «اِحْلِقُوا شَعْرَ اَلْبَطْنِ لِلذَّكَرِ وَ اَلْأُنْثَى.
The Messenger of Allah (saws) said: "Shave the abdomen hair for both males and females." (And in another version, it includes armpit hair).