Suuratul – Shuuraa Verses 23 and 28.
ذَٰلِكَ ٱلَّذِى يُبَشِّرُ ٱللَّـهُ عِبَادَهُ ٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّـٰلِحَـٰتِ ۗ قُل لَّآ أَسْـَٔلُكُمْ عَلَيْهِ أَجْرًا إِلَّا ٱلْمَوَدَّةَ فِى ٱلْقُرْبَىٰ ۗ وَمَن يَقْتَرِفْ حَسَنَةً نَّزِدْ لَهُۥ فِيهَا حُسْنًا ۚ إِنَّ ٱللَّـهَ غَفُورٌ شَكُورٌ ﴿٢٣
وَهُوَ ٱلَّذِى يُنَزِّلُ ٱلْغَيْثَ مِنۢ بَعْدِ مَا قَنَطُوا۟ وَيَنشُرُ رَحْمَتَهُۥ ۚ وَهُوَ ٱلْوَلِىُّ ٱلْحَمِيدُ ﴿٢٨
23. That is (the Paradise) whereof Allah gives glad tidings to His slaves who believe and do righteous good deeds. Say: “No reward do I ask of you for this except to be kind to me for my kinship with you.” And whoever earns a good righteous deed, We shall give him an increase of good in respect thereof. Verily, Allah is Oft-Forgiving, Most Ready to appreciate.
28. And He it is Who sends down the rain after they have despaired, and spreads abroad His Mercy. And He is the Wali (Helper, Supporter, Protector, etc.), Worthy of all Praise.
Tafsir Ibn Kathir Volume 8, Pages 586 and 591.
﴿إِنَّ اللَّهَ غَفُورٌ شَكُورٌ﴾
Verily, Allah is Oft-Forgiving, Most Ready to appreciate.
means, He forgives many bad deeds and increases a small amount of good deeds; He conceals and forgives sins and He multiplies and increases the reward of good deeds.
Qatadah said, “We were told that a man said to `Umar bin Al-Khattab, may Allah be pleased with him, `O Commander of the faithful, no rain has come and the people are in despair.’ `Umar, may Allah be pleased with him, said, `Rain will be sent upon you,’ and he recited:
﴿وَهُوَ الَّذِى يُنَزِّلُ الْغَيْثَ مِن بَعْدِ مَا قَنَطُواْ وَيَنشُرُ رَحْمَتَهُ وَهُوَ الْوَلِىُّ الْحَمِيدُ ﴾
And He it is Who sends down the rain after they have despaired, and spreads His mercy. And He is the Protector, Worthy of all praise.”
Meaning He is the One Who is in control of His creation, taking care of what will benefit them in this world and the Hereafter, and the consequences of all His decrees and actions are good, for which He is worthy of all praise.