Refrain from cutting one's hair and nails during the first ten days of Dhu al Hjjaa .

This hadith is about the importance of refraining from cutting one's hair and nails during the first ten days of Dhul Hijjah. It was narrated by 'Amr bin Muslim who heard it from Ibn Al Musayyab who in turn heard it from Umm Salamah, wife of Prophet Muhammad (PBUH). During these ten days, Muslims are encouraged to offer a sacrifice known as Qurbani which is an act of worship that symbolizes obedience to Allah and His commands. By refraining from cutting one's hair and nails during this period, Muslims are reminded that they should be focused on worshipping Allah instead of focusing on worldly matters such as personal grooming. This hadith also teaches us that we should prioritize our spiritual needs over our physical needs in order to gain closeness with Allah SWT.