Saeed bin Musayyib narrates that a Jew and a Muslim came to Sayyiduna Umar bin Khattab (may Allah be pleased with him) while disputing with each other. Sayyiduna Umar bin Khattab (may Allah be pleased with him) found the truth to be with the Jew, so he judged in his favor. Then the Jew said, "By Allah! You have judged justly." Sayyiduna Umar bin Khattab (may Allah be pleased with him) struck him with a whip and said, "How did you know?" The Jew replied, "It is written in our books: When a ruler judges justly, there is an angel on his right and an angel on his left; both strengthen him and guide him to the straight path as long as he remains firm upon the truth. When he abandons the truth, those angels also leave him and ascend to the heavens."