It is narrated from Hazrat Amr bin Aas (may Allah be pleased with him) that he heard the Prophet (peace and blessings of Allah be upon him) say: When a ruler passes a judgment and strives with full caution and effort and makes the correct decision, he will receive a double reward, and if he makes a mistake despite caution, he will still receive a single reward. The previous hadith is also narrated from Hazrat Abu Hurairah (may Allah be pleased with him) through this second chain of narration.