عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ عَنْ أَبِيهِ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَمَرَ بِحَدِّ الشِّفَارِ وَأَنْ تُوَارَى عَنِ الْبَهَائِمِ وَإِذَا ذَبَحَ أَحَدُكُمْ فَلْيُجْهِزْ
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) ordered that the knife be sharpened and kept hidden from the animals, and also said that when any of you slaughters an animal, he should do so quickly.