‘Ā’ishah (may Allah be pleased with her) reported that they slaughtered a sheep, so the Prophet (may Allah's peace and blessings be upon him) asked: “What is left of it?” She replied: “Nothing is left except its shoulder.” He said: “All of it is left except its shoulder.”
The Prophet (may Allah's peace and blessings be upon him) slaughtered a sheep then they gave all of it in charity except its shoulder. So he said to ‘Ā’ishah (may Allah be pleased with her) that all of the sheep remains for them with Allah, the Almighty, as a reward that they will receive in the Hereafter, because it was given out in charity. As to the part that was not given out in charity (the shoulder), it is actually not left for them because it is not rewarded.