Follow the teachings of Prophet Muhammad carefully and make sure your decisions are in line with them.

This hadith is about the importance of following the teachings of Prophet Muhammad. In this hadith, Umar saw Ali bin Abi Talib praying two rak'ahs after Asr and got angry with him because he was certain that Prophet Muhammad had forbidden it. This shows us how important it is to follow the teachings of Prophet Muhammad and not do anything against them. We should always be sure to follow his teachings in order to stay on the right path. It also teaches us that we should be careful when making decisions or taking actions, as we must make sure they are in line with what our beloved prophet has taught us.