Use a siwk when preparing for prayers/worship/du'a .

This hadith is about the importance of using a siwak before performing prayers. A siwak is a small twig or stick that is used for cleaning the teeth and mouth. It was narrated by Hudhaifa that whenever the Prophet Muhammad ﷺ got up for Tahajjud prayer he would use a siwak to clean his mouth and teeth. This shows us how important it was for him to be physically and spiritually clean before praying. It also teaches us that we should take care of our hygiene in order to be able to perform our prayers properly and with sincerity. Furthermore, this hadith also serves as an example for us on how we should prepare ourselves spiritually before engaging in any form of worship or prayer.