If you make a generous loan to Allah He will multiply it for you and forgive you. Allah is most Ready to appreciate [service], Most Clement. (Surat at-Taghabun, 64:17)
Allah gives countless blessings to us and only asks each of us to be a grateful servant. Allah draws our attention to the importance of being grateful in Surah Ibrahim 14:7: " ...And when your Lord announced: 'If you are grateful, I will certainly give you increase; but if you are ungrateful, My punishment is severe.'"
One who does not give thanks for all of these blessings will be repaid in the Hereafter, for Allah's infinite justice requires this. However, Allah is very compassionate toward His servants, as the Qur'an states:
Allah does not wrong anyone by so much as the smallest speck. And if there is a good deed, Allah will multiply it and pay out an immense reward direct from Him. (Surat an-Nisa,' 4:40)
Whoever does a good deed for Allah's cause will be rewarded with what is better on the Day of Judgment.
That is the good news that Allah gives to His servants who believe and do right actions. Say: “I do not ask you for any wage for this—except for you to love your near of kin. If anyone does a good action, We will increase the good of it for him. Allah is Ever-Forgiving, Ever-Thankful.” (Surat ash-Shura, 42:23)
That He will pay them their wages in full and give them more from His unbounded favor. He is Ever-Forgiving, Ever-Thankful. (Surah Fatir, 35:30)
They will say: “Praise be to Allah, Who has removed all sadness from us. Truly our Lord is Ever-Forgiving, Ever-Thankful.” (Surah Fatir, 35:34)