Al-Kahf 18:39

If only you had said, when you entered your garden, ‘This is by Allah’s Will; there is no power except with Allah.’ Even though you see me as inferior to you in wealth and children,

And why did you, when you entered your garden, not say, 'What Allāh willed [has occurred]; there is no power except in Allāh'? Although you see me less than you in wealth and children,

39. "It was better for you to say, when you entered your garden: ‘That which Allâh wills (will come to pass)! There is no power but with Allâh[2]!’ If you see me less than you in wealth, and children,

[2] (V.18:39): What is said regarding the statement: Lâ haulâ walâ quwwata illa billâh (i.e. There is neither might nor power except with Allâh).
Narrated Abu Mûsâ Al-Ash‘ari: The Prophet صلى الله عليه وسلم started ascending a high place or a hill. A man (amongst his companions) ascended it and shouted in a loud voice. Lâ ilâha illal-lahu wallâhu Akbar* (At that time) Allâh’s Messenger صلى الله عليه وسلم was riding his mule. Allâh’s Messenger صلى الله عليه وسلم said, "You are not calling upon a deaf or an absent one." and added, "O Abu Mûsâ (or, O ‘Abdullâh)! Shall I tell you a sentence from the treasure of Paradise?" I said, "Yes." He said,"Lâ haulâ walâ quwwata illa billâh" (Sahih Al-Bukhari, Vol. 8, Hadith No. 418).
*None has the right to be worshipped but Allâh, and Allâh is the Most Great.

If only, when thou enteredst thy garden, thou hadst said: That which Allah willeth (will come to pass)! There is no strength save in Allah! Though thou seest me as less than thee in wealth and children,