Perform wudu before making any vows or promises to Allah .

This hadith is narrated by Abu Hurairah and it talks about the importance of performing wudu before performing nadh. Wudu is an Islamic ritual that involves washing certain parts of the body with water in a specific order. It is usually done for purification purposes and to prepare oneself for prayer or other religious activities. On the other hand, nadh is a vow or promise made to Allah in which one pledges to do something good or abstain from doing something bad. This hadith teaches us that we should perform wudu before making any vows or promises to Allah as it helps us stay focused on our commitment and strengthens our faith in Him. It also reminds us that we should always strive to keep our promises and fulfill our obligations towards Allah, no matter how difficult they may seem at times.