إِنْ شَاءَ اللَّهُ

inshaa'Allah

If Allah wills. And never say of anything, "Indeed, I will do that tomorrow," Except [when adding], "If Allah wills." And remember your Lord when you forget [it] and say, "Perhaps my Lord will guide me to what is nearer than this to right conduct."

Reference: Sura Al Kahf: 23-24