The Messenger of Allah ﷺ said, "When one of you takes an oath, he should not say, 'Whatever Allah wills and you will,' but rather he should say, 'Whatever Allah wills, then what you will.'"
قال رسول الله ﷺ: وإذا حلف أحدكم فلا يقل: ما شاء الله وشئت، ولكن ليقل: ما شاء الله ثم شئت.
Ibn Majah (2117) narrated it from Hisham bin Ammar, who said, our teacher Isa bin Yunus told us, who said, Ajlah Kindi told us, from Yazid bin Asam, from Ibn Abbas, and he related it.Its chain is hasan because of Hisham bin Ammar and Ajlah, who is Ibn Abdullah bin Hujayyah Kindi, for both of them are subjects of disagreement, though scholars have graded the hadith hasan. See the hadiths of this chapter in the Book of Faith.These verses indicate the existence of the Wise Maker, for this precisely ordered world must have a maker. A bedouin was once asked, "What is the proof of the existence of the Lord, Most High?" He said, "Camel dung indicates the camel, donkey droppings indicate the donkey, and footprints indicate travel. So a sky full of constellations, an earth full of paths, and seas full of waves, do they not indicate the Maker who is Gentle, Knowing, and Powerful?"Razi mentioned this in his commentary (2/99-100).