فَتَلَقّٰٓى اٰدَمُ مِنْ رَّبِّهٖ كَلِمٰتٍ فَتَابَ عَلَيْهِ ۗ اِنَّهٗ هُوَ التَّوَّابُ الرَّحِيْمُ ( البقرة: ٣٧ )
Fatalaqqaaa Aadamu mir Rabbihee Kalimaatin fataaba 'alayh; innahoo Huwat Tawwaabur Raheem (al-Baq̈arah 2:37)
Then Adam received from his Lord [some] words, and He accepted his repentance. Indeed, it is He who is the Accepting of Repentance, the Merciful. (Al-Baqarah  : 37)
1 Mufti Taqi Usmani
Then ’Ādam learned certain words (to pray with) from his Lord; so, Allah accepted his repentance. No doubt, He is the Most-Relenting, the Very-Merciful.