Get your head shaved or your hair clipped after sacrificing an animal on the 10th day of Dhu'l-Hijja .

This hadith is about the importance of shaving or clipping one's hair after sacrificing an animal on the 10th of Dhu'l-Hijja, which is known as Qurbani in Arabic. It was reported by Abdullah ibn Umar that Allah's Messenger (PBUH) got his head shaved and a group of Companions did too, while some got their hair clipped. He then said "May Allah have mercy upon those who get their heads shaved" and "upon those too who got their hair clipped". This shows us that both acts are equally important in showing our devotion to Allah SWT. It also teaches us to be generous with our time and resources for the sake of pleasing Allah SWT, as well as being mindful of others who may not have access to such resources.