From what is
considered as righteous actions on these ten days is that the one who wants to do the Udhiyyah (sacrificial
slaughter) should NOT cut his hair or nails during these ten days. As such, it is desired that he commits himself before these ten days by cutting his hair and nails.
The Prophet صلّى
اللَّهُ عليه وسلّم
said:
"When any one of you intending to sacrifice the animal enters
in the month (of Dhul-Hijjah) he
should NOT get his hair or nails touched, (cut)."
[Muslim]
