Nails should be cut within 40 days. It is Sunnah to cut our nails every 15 days. Nails should not be bitten For hand nails start with the right hand index finger and finish with the right hand thumb. For the feet start with the small toe on the
right foot and finish with the small toe on the left foot. After cutting the nails bury them all.
Clipping the nails is one of the Sunan al-Fitrah, as is indicated by the saheeh ahaadeeth, and it is mustahabb to start on
the right, because it is proven in Saheeh al-Bukhaari (163) that ‘Aa’ishah (may Allah be pleased with him) said: The Prophet (peace and blessings of Allah be upon him) used to like to start on the right when putting on shoes, combing his hair, purifying himself and in all his affairs.
Ibn Hajar said in Fath al-Baari (10/345):
There is no proven hadeeth about the order of fingers when cutting the nails. … Ibn Daqeeq al-Eid rejected the order mentioned by al-Ghazaali and those who followed him, and he said: There is no basis for any of that, and to suggest that it is mustahabb when there is no evidence for that is abhorrent in my view. If anyone were to suggest that it is mustahabb to start with the right forefinger because of its honorable status, there is no basis for the rest of this sequence. Yes there is a basis for starting with the right hand and the right foot, which is “he liked to start on the right.” End quote.
