Sunan Ibn Majah 3172

Muḥammad ibn ʿAbd al-Raḥmān, nephew of Ḥusayn al-Juʿfī, narrated to us: Marwān ibn Muḥammad narrated to us: Ibn Lahīʿah narrated to us: Qurrat ibn Ḥaywāʾīl told me, from al-Zuhrī, from Sālim ibn ʿAbd Allāh ibn ʿUmar, from his father ʿAbd Allāh ibn ʿUmar, who said: The Messenger of God (peace and blessings be upon him) commanded that blades be sharpened and that this be concealed from the animals. He said: When one of you slaughters, let him finish quickly. [Another chain:] Jaʿfar ibn Musāfir narrated to us: Abū al-Aswad narrated to us: Ibn Lahīʿah narrated to us, from Yazīd ibn Abī Ḥabīb, from Sālim, from his father, from the Prophet (peace and blessings be upon him), with the same wording.