When no man can work

While in this life, we are privileged to be co laborers with God. But a time is coming when that will not be the case.

Here's how Jesus put it:

As long as it is day, we must do the works of him who sent me. Night is coming, when no one can work. (John 9:24)

We will be rewarded for work done on this side of eternity. That work is the labor that we labor with God, otherwise they'll be dead works.