Doctrine and Covenants 64:33-34

Wherefore, be ye not weary in well-doing, for ye are laying the foundation of a great work. And out of small things proceedeth that which is great.

Behold, the Lord requireth the heart and a willing mind; and the willing and obedient shall eat the good of the land of Zion in these last days.

2 Nephi 13:10

Say unto the righteous that it is well with them; for they shall eat the fruit of their doings. (See Isaiah 3:10)