1 Corinthians 15:58
Therefore, my beloved brothers, be you steadfast, unmovable, always abounding in the work of the Lord, for as much as you know that your labor is not in vain in the Lord.
Torrey's Topical Textbook—AKJV

Galatians 6:9
And let us not be weary in well doing: for in due season we shall reap, if we faint not.
Torrey's Topical Textbook—AKJV