Perform wudu properly and thoroughly before prayer .

This hadith is about the importance of performing ablution or wudu before prayer. It was narrated by 'Umar that he saw the Prophet Muhammad (PBUH) during the campaign of Tabuk performing ablution, washing each part once. This hadith teaches us that it is important to perform wudu properly and thoroughly in order to be able to pray with a clean heart and mind. It also shows us that even in difficult times such as war campaigns, we should still take time out for our religious obligations and duties. Furthermore, this hadith also serves as an example for us on how to perform wudu correctly; washing each part once instead of multiple times unless necessary.