It was narrated from Anas bin Malik that the Messenger of Allah ﷺ recited this Verse:
“He (Allah) is the One, deserving that mankind should be afraid of, and should be dutiful to Him, and should not take any Ilah (god) along with Him, and He is the One Who forgives (sins).” [74:56] Then he said: “Allah says: ‘I am the One Who deserves to be feared, so no other god should be appointed alongside Me. Whoever avoids appointing another god alongside Me, I am the One Who should forgive him.”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا زَيْدُ بْنُ الْحُبَابِ، حَدَّثَنَا سُهَيْلُ بْنُ عَبْدِ اللَّهِ، - أَخُو حَزْمٍ الْقُطَعِيِّ - حَدَّثَنَا ثَابِتٌ الْبُنَانِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ ـ ﷺ ـ قَرَأَ - أَوْ تَلاَ - هَذِهِ الآيَةَ {هُوَ أَهْلُ التَّقْوَى وَأَهْلُ الْمَغْفِرَةِ} فَقَالَ " قَالَ اللَّهُ عَزَّ وَجَلَّ أَنَا أَهْلٌ أَنْ أُتَّقَى فَلاَ يُجْعَلَ مَعِي إِلَهٌ آخَرُ فَمَنِ اتَّقَى أَنْ يَجْعَلَ مَعِي إِلَهًا آخَرَ فَأَنَا أَهْلٌ أَنْ أَغْفِرَ لَهُ " .