Is it valid to say: “By the Life of Allaah”?

Question 312: Is it valid to swear by the Life of Allaah saying, “By the Life of Allaah”? Ibn Al-Qayyim mentioned this in a poem entitled “Al-Nooniyyah Al-Shafiyah Al-Kafiyah”.

Answer: It is permissible for a Muslim to say, “By the Life of Allaah.” There is nothing wrong with this, as it involves swearing by an established Attribute of Allaah. A Muslim may swear by any of the Names of Allaah or His Attributes... read more here.