15:55
قَالُ وا۟ بَشَّرْ نَٰ كَ بِ ٱلْ حَقِّ فَ لَا تَكُن مِّنَ ٱلْ قَٰنِطِينَ
They said, "We have given you good tidings in truth, so do not be of the despairing."
15:56
قَالَ وَ مَن يَقْنَطُ مِن رَّحْمَةِ رَبِّ هِۦٓ إِلَّا ٱل ضَّآلُّونَ
He said, "And who despairs of the mercy of his Lord except for those astray?"
30:36
وَ إِذَآ أَذَقْ نَا ٱل نَّاسَ رَحْمَةً فَرِحُ وا۟ بِ هَا وَ إِن تُصِبْ هُمْ سَيِّئَةٌۢ بِ مَا قَدَّمَتْ أَيْدِي هِمْ إِذَا هُمْ يَقْنَطُ ونَ
And when We let the people taste mercy, they rejoice therein, but if evil afflicts them for what their hands have put forth, immediately they despair.
39:53
قُلْ يَٰ عِبَادِ ىَ ٱلَّذِينَ أَسْرَفُ وا۟ عَلَىٰٓ أَنفُسِ هِمْ لَا تَقْنَطُ وا۟ مِن رَّحْمَةِ ٱللَّهِ إِنَّ ٱللَّهَ يَغْفِرُ ٱل ذُّنُوبَ جَمِيعًا إِنَّ هُۥ هُوَ ٱلْ غَفُورُ ٱل رَّحِيمُ
Say, "O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful."
42:28
وَ هُوَ ٱلَّذِى يُنَزِّلُ ٱلْ غَيْثَ مِنۢ بَعْدِ مَا قَنَطُ وا۟ وَ يَنشُرُ رَحْمَتَ هُۥ وَ هُوَ ٱلْ وَلِىُّ ٱلْ حَمِيدُ
And it is He who sends down the rain after they had despaired and spreads His mercy. And He is the Protector, the Praiseworthy.