1706/1 - Umm Salamah (may Allah be pleased with her) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “Whoever has a sacrificial animal for slaughtering, once the crescent of Dhul-Hijjah is declared, he should not cut anything of his hair or his nails until he sacrifices (the animal).” [Narrated by Muslim]
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1) One who intends to offer a sacrifice and has seen the crescent of Dhul-Hijjah is prohibited from cutting anything from his nails or hair.
2) The believers show love and cordiality towards one another as they engage in acts of worship. He who is not on the journey of Hajj lives part of the rituals along with his fellow Muslims performing Hajj, as he is not allowed to cut anything of his hair or nails.