The Reward for avoiding Sin

Allah says: `This is what We have commanded you to do in the rituals (of Hajj), and this is the great reward that the person who does that will gain.'

﴿ وَمَن يُعَظِّمۡ حُرُمَـٰتِ ٱللَّهِ ﴾

(whoever honors the sacred things of Allah,) means, whoever avoids disobeying Him and does not transgress that which is sacred, and regards committing sin as a very serious matter,

﴿ فَهُوَ خَيۡرٌ۬ لَّهُ ۥ عِندَ رَبِّهِۦ‌ۗ ﴾

(then that is better for him with his Lord.) means, he will attain much good and a great reward for doing that. Just as the one who does acts of obedience will earn a great reward, so too, the one who avoids sin will earn a great reward.