وَلَقَدۡ عَهِدۡنَآ إِلَىٰٓ ءَادَمَ مِن قَبۡلُ فَنَسِيَ وَلَمۡ نَجِدۡ لَهُۥ عَزۡمٗا ١١٥
And We had already taken a promise from Adam before, but he forgot; and We found not in him determination.1
Translation: Saheeh International (English)
1 To resist temptation.
Each word's meaning and sound
And I enjoined on Adam beforehand not to eat of the tree, and I forbade him from this and explained to him its consequences. But he forgot the instruction, ate of the tree and was unable to resist it. And I did not see in him resolve to observe what I enjoined.
Al-Mukhtasar in interpreting the Noble Quran