Perform ablution before responding to a salutation.

This hadith highlights the importance of performing wudu before returning a greeting. It was narrated by Al-Muhajir bin Qunfudh that he greeted the Prophet with salam while he was urinating, and the Prophet did not return the greeting until he had performed wudu. This shows us that it is important to perform ablution before responding to a salutation, as it is considered disrespectful otherwise. Additionally, this hadith teaches us about respect for others and how we should be mindful of our actions when interacting with them.