Reward
A "reward" in the Bible represents something that brings people together, or brings spiritual states together, and binds them. In the Bible, of course -- especially the New Testament -- we're told repeatedly to do what is good and right "without thought of reward." That's because removing the idea of a natural reward lets us be aware of spiritual rewards, which are actually intrinsic to the good that's being done. On a relatively low level, we feel delight in doing something nice and useful for someone else; that delight is a reward. The love that can exist between partners in a committed, loving marriage is a reward. The delight we feel when we truly want what is good and know how to create it is a reward. And ultimately, our conjunction with the Lord and the delight of His love and salvation is the deepest reward of all. These are the things meant when the Bible speaks of "rewards.
Arcana Coelestia # 5737
5737. 'And his silver for grain' means the truth of good. This is clear from the meaning of 'silver' as truth, dealt with in 1551, 2954, 5658, and from the meaning of 'grain' as good, dealt with in 5295, 5410. For interior or spiritual truth, which goes forth from the internal celestial represented by 'Joseph', is the truth of good. For what the truth of good is, see just above in 5733.