Narrated Thabit bin Adh-Dahhak: That the Messenger of Allah ﷺ said: "Whoever swears by a religion other than Islam while lying, then he is as he said".
The Prophet Muhammad ﷺ taught us that truthfulness leads to righteousness while falsehood leads to evil deeds. He also said that one should never swear an oath on something false or untrue because it will lead them astray from the path of righteousness. This hadith serves as an important reminder for us all to be mindful of our words and actions at all times so that we can stay true to our faith and remain on the path of righteousness.