Take an oath only if you are sure you can fulfill it with honesty & integrity .

This hadith is teaching us that we should not take an oath to follow a religion other than Islam. Taking an oath is a serious matter and if someone takes an oath to follow another religion while knowing it is false, they will be held accountable for their words. We should always strive to tell the truth and not make false promises or statements. It is important to remember that Allah knows all and He will hold us accountable for our actions in this life and the hereafter.

This hadith also teaches us about accountability; we must always be mindful of our actions as Allah will judge us based on them. We must strive to do good deeds in order to receive His mercy and blessings in this life and the hereafter. Furthermore, it reminds us of the importance of being truthful; lying can have serious consequences so we should always strive to speak truthfully even when it may seem difficult or inconvenient at times.