﴿ وَلَقَدْ عَهِدْنَآ إِلَىٰٓ ءَادَمَ مِن قَبْلُ فَنَسِىَ وَلَمْ نَجِدْ لَهُۥ عَزْمًۭا ﴾

“AND, INDEED, long ago did We impose Our commandment on Adam; but he forgot it, and We found no firmness of purpose in him.”

Please check ayah 20:122 for complete tafsir.