Sayyiduna Abdullah bin Ka'b Ansari (may Allah be pleased with him) narrates that a group of the Ansari companions of the Messenger of Allah (peace and blessings be upon him) said to Sayyiduna Umar (may Allah be pleased with him): "Umar! You have become heedless of us and have made us heedless as well, whereas the Messenger of Allah (peace and blessings be upon him) had given an order regarding the rotation of armies concerning us, but you have stopped acting upon it."