Silsilah Sahihah

Abdullah bin Abbas (may Allah be pleased with them) reports that the Messenger of Allah (peace and blessings be upon him) passed by a man who was sharpening his knife while placing his foot on the side of a goat, and the goat was watching him out of the corner of its eye. The Prophet (peace and blessings be upon him) said: "Why did you not do this (sharpen the knife) earlier? Do you want to kill it twice?"