Nehemiah 4:21
So we carried on with the work with half of them holding spears from dawn until the stars came out.
1 Corinthians 15:10
But by the [remarkable] grace of God I am what I am, and His grace toward me was not without effect. In fact, I worked harder than all of the apostles, though it was not I, but the grace of God [His unmerited favor and blessing which was] with me.
1 Corinthians 15:58
Therefore, my beloved brothers and sisters, be steadfast, immovable, always excelling in the work of the Lord [always doing your best and doing more than is needed], being continually aware that your labor [even to the point of exhaustion] in the Lord is not futile nor wasted [it is never without purpose].
Galatians 6:9
Let us not grow weary or become discouraged in doing good, for at the proper time we will reap, if we do not give in.
Colossians 1:29
For this I labor [often to the point of exhaustion], striving with His power and energy, which so greatly works within me.