"The Messenger of Allah said: 'The deeds connected to the Fitrah are five (or five things are connected to the Fitrah): circumcision, shaving the pubic hairs, clipping the nails, plucking the armpit hairs and trimming the mustache.'"  

قَالَ رَسُولُ اللَّهِ ﷺ الْفِطْرَةُ خَمْسٌ أَوْ خَمْسٌ مِنَ الْفِطْرَةِ الْخِتَانُ وَالاِسْتِحْدَادُ وَتَقْلِيمُ الأَظْفَارِ وَنَتْفُ الإِبِطِ وَقَصُّ الشَّارِبِ  

"The Messenger of Allah said: 'Ten things are connected to the Fitrah: trimming the mustache, letting the beard grow, using the tooth stick, rinsing out the nostrils with water, clipping the nails, washing the joints, plucking the armpit hairs, shaving the pubic hairs, washing the private parts with water.'"(One of the narrators) Zakariyya said: "Mus'ab said: 'I have forgotten the tenth thing, but it may have been rinsing out the mouth.'"  

قَالَ رَسُولُ اللَّهِ ﷺ عَشْرٌ مِنَ الْفِطْرَةِ قَصُّ الشَّارِبِ وَإِعْفَاءُ اللِّحْيَةِ وَالسِّوَاكُ وَالاِسْتِنْشَاقُ بِالْمَاءِ وَقَصُّ الأَظْفَارِ وَغَسْلُ الْبَرَاجِمِ وَنَتْفُ الإِبِطِ وَحَلْقُ الْعَانَةِ وَانْتِقَاصُ الْمَاءِ يَعْنِي الاِسْتِنْجَاءَ قَالَ زَكَرِيَّا قَالَ مُصْعَبٌ وَنَسِيتُ الْعَاشِرَةَ إِلاَّ أَنْ تَكُونَ الْمَضْمَضَةَ  

The Messenger of Allah said: "Part of the Fitrah is rinsing out the mouth, rinsing out the nostrils, using the tooth stick, trimming the mustache, clipping the nails, plucking the armpit hairs, shaving the pubic hairs, washing the joints, washing the private parts and circumcision.'" (Da'if) Another chain with similar wording.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مِنَ الْفِطْرَةِ الْمَضْمَضَةُ وَالاِسْتِنْشَاقُ وَالسِّوَاكُ وَقَصُّ الشَّارِبِ وَتَقْلِيمُ الأَظْفَارِ وَنَتْفُ الإِبِطِ وَالاِسْتِحْدَادُ وَغَسْلُ الْبَرَاجِمِ وَالاِنْتِضَاحُ وَالاِخْتِتَانُ حَدَّثَنَا جَعْفَرُ بْنُ أَحْمَدَ بْنِ عُمَرَ حَدَّثَنَا عَفَّانُ بْنُ مُسْلِمٍ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ عَلِيِّ بْنِ زَيْدٍ مِثْلَهُ  

"We were given a time limit with regard to trimming the mustache, shaving the pubic hairs, plucking the armpit hairs and clipping the nails. We were not to leave that for more than forty days."  

وُقِّتَ لَنَا فِي قَصِّ الشَّارِبِ وَحَلْقِ الْعَانَةِ وَنَتْفِ الإِبْطِ وَتَقْلِيمِ الأَظْفَارِ أَنْ لاَ نَتْرُكَ أَكْثَرَ مِنْ أَرْبَعِينَ لَيْلَةً