Translation of the verse 13 from Surah Al-Jinn : Number of verses 28 - - page 572 - Part 29.
'And indeed when we heard the Guidance (this Quran), we believed therein (Islamic Monotheism), and whosoever believes in his Lord shall have no fear, either of a decrease in the reward of his good deeds or an increase in punishment for his sins.
And when we heard the guidance, we believed in it. And whoever believes in his Lord will not fear deprivation or burden.
(72:13) and that 'when we heard the teaching of the Right Way we came to believe in it; he who believes in His Lord shall have no fear of suffering loss or being subjected to any injustice'; *13
*13) "Fear of loss": fear of being given a lesser reward than what one actually deserves for one's good deeds, and "injustice" that one may be deprived of the reward for the good deeds done but duly punished for the errors committed or punished innocent; no believer has any fear of such an injustice from Allah.