Follow instructions from Allah's messenger before taking any action.

This hadith is about the importance of following the example of Prophet Muhammad when it comes to sacrificing animals on Eid Al-Adha. The Prophet instructed those who had already sacrificed their animals ahead of him to slaughter another one in its place, and not to sacrifice the animal before he had sacrificed his own. This teaches us that we should always follow the example set by our beloved prophet and strive to emulate his actions in all aspects of our lives. It also shows us that we should be patient and wait for instructions from Allah's messenger before taking any action, as this will ensure that we are doing things correctly according to Islamic teachings.