The ruling on saying: "By your life, you are truthful"

Question:
May Allah reward you, Your Eminence, father. The questioner asks: Is there a religious prohibition in this phrase, which some people say: "By your life, you are truthful," or their saying "By the helper"? What is the situation with its meaning among us?

Answer:
If this is an oath, then it is shirk (associating partners with Allah) or kufr (disbelief), as the Messenger (peace and blessings be upon him) said: So if the intention behind this is to swear by a created being, then it is haram (forbidden) and shirk. The Muslim should abandon this, even if people are using it; you should not use it. Yes.