Ask Allāh With Certainty
قال رسول الله صلى الله عليه وسلم : .. فَإِذَا سَأَلْتُمُ اللَّهَ عَزَّ وَجَلَّ أَيُّهَا النَّاسُ فَاسْأَلُوهُ وَأَنْتُمْ مُوقِنُونَ بِالإِجَابَةِ..
The Messenger of Allāh ﷺ said: “.. So when you ask Allāh عزوجل, O people, then ask Him while you are certain of its answer..”
Musnad Ahmad 6478
Isnad Daif (al-Albani) ( 1026 ضعيف الترغيب)
Ibn Lahiah one of the narrators is weak,
Similar weak hadith in Tirmidhi 3479.
However, the meaning is correct. And Allah Knows Best