The Exalted said: “Why should Allah punish you if you have thanked (Him) and have believed in Him. And Allah is Ever All-Appreciative (of good), All-Knowing.”
(An-Nisa: 147), and He said: “Verily, our Lord is indeed Oft-Forgiving, Most Ready to appreciate (good deeds and to recompense).” (Fatir: 34).
The Linguistic Meaning:
Ashshukr= Growth, and addition, and it is good commendation for good deed.
God, the Praiseworthy, is As-Hshaker and As-Hshakoor: He appreciates any obedience no matter how small it is. He gives multiple rewards in return, and He provides plenty of graces, whereas He is satisfied with little thanks. He thanks His slave by His Speech, praising the slave amongst His angels. Also by His Action, dropping the thanks to him (the slave) amongst other slaves.
The Grandeur of As-Hshaker, As-Hshakoor
He rewards His enemy by giving the enemy benevolence in this life, and by reducing the punishment in the Hereafter, in spite of the fact that the enemy is a very loathsome slave; His Grandeur is evident when He forgave a prostitute who gave water to a thirsty dog. He is so Grand that He rewards His slave (in return for small pious deeds, done in few days), eternal Paradise.