The Sura warns Muslims never to say that they will do something in the future without adding this.
Though this Arabic phrase does not appear in the New Testament, its sentiment is expressed in Chapter Four of the Book of James. Its use is encouraged by the 18th Sura of the Koran, known as The Cave. In one story, Muhammad forgets to use it, so he has to wait fifteen days for a revelation that he promised to have the next morning. The Sura warns Muslims never to say that they will do something in the future without adding this. Give this Arabic phrase which means God Willing.
Though this Arabic phrase does not appear in the New Testament, its sentiment is expressed in Chapter Four of the Book of James.
Insha'Allah