Perform religious duties properly according to Islamic teachings ; Respect for Allah's Messenger ; Wash certain parts of body in specific order .

This hadith is about Ali demonstrating how the Prophet Muhammad performed wudu, which is a ritual ablution. Wudu is an important part of Islamic practice and involves washing certain parts of the body in a specific order. In this hadith, Ali washed his hands until they were clean, rinsed out his mouth three times, sniffed water into his nose and blew it out three times, washed his face three times, and wiped his head once. He then washed his feet up to the ankles before standing up and drinking what was left over from the purification water. Through this demonstration, Ali wanted to show people how Allah's Messenger purified himself. This hadith teaches us that we should take care to perform our religious duties properly as prescribed by Allah's Messenger so that we can be purified spiritually as well as physically.