Surah At-Taubah, Verse 105 & Surah Al-Kahf, Verse 30 :

And say:

Work;

so Allah will see your work and (so will) His Apostle and the believers; and you shall be brought back to the Knower of the unseen and the seen, then He will inform you of what you did.

Surely (as for) those who believe and do good, We do not waste the reward of him who does a good work.