Abu Hurairah narrated that the Messenger of Allah said: "None of you should say: 'O Allah forgive me if You wish. O Allah have mercy on me if You wish.’ Let him be firm in asking, for there is none that can compel Him to do things".
This hadith also reminds us of the importance of having faith in Allah's power and wisdom when making supplications or asking for something from Him. We must remember that no matter how difficult a situation may seem, nothing is impossible for Him; if He wills it then it shall be done! Therefore, we should never give up hope or lose faith in His ability to answer our prayers according to what is best for us - even if the outcome isn't what we expected or wanted at first glance.