كتاب الطهارة
Read the English translation first, with the original Arabic directly underneath.
Narrated Aisha, Ummul Mu'minin:
The Messenger of Allah (ﷺ) said: Ten are the acts according to fitrah (nature): clipping the moustache, letting the beard grow, using the tooth-stick, cleansing the nose (Al-Istinshaq) with water, cutting the nails, washing the finger joints, plucking the hair under the arm-pits, shaving the pubes, and cleansing one's private parts (after easing or urinating) with water. The narrator said: I have forgotten the tenth, but it may have been rinsing the mouth.
عَشْرٌ مِنَ الْفِطْرَةِ قَصُّ الشَّارِبِ وَإِعْفَاءُ اللِّحْيَةِ وَالسِّوَاكُ وَالاِسْتِنْشَاقُ بِالْمَاءِ وَقَصُّ الأَظْفَارِ وَغَسْلُ الْبَرَاجِمِ وَنَتْفُ الإِبِطِ وَحَلْقُ الْعَانَةِ وَانْتِقَاصُ الْمَاءِ