Learn Why Modern Christians Rarely Talk about Rewards in
Heaven, by Michael J Kruger, at Bible Study Tools.
"Whenever a sermon (or book) provides a motive for obedience, it is almost always thankfulness for what Christ has done. And certainly that is a wonderful and foundational motivation...But is it the only motivation? The New Testament writings suggest it is not."
There is certainly reward for those who faithfully endure persecution:
Be glad in that day and leap for joy, for behold, your reward is great in heaven. For in the same way their fathers used to treat the prophets.
By faith Moses, when he had grown up, refused to be called the son of Pharaoh's daughter, choosing rather to endure ill-treatment with the people of God than to enjoy the passing pleasures of sin, considering the reproach of Christ greater riches than the treasures of Egypt; for he was looking to the reward.
"But sometimes people are careless and speak disparagingly of all human righteousness, as if there were no such thing that pleased God. They often cite (Isaiah 64:6) which says our righteousness is as filthy rags…[But] when my sons do what I tell them to do—I do not call their obedience “filthy rags” even if it is not perfect. Neither does God. All the more because he himself is “working in us that which is pleasing in his sight” (Hebrews 13:21). He does not call his own, Spirit-wrought fruit, “rags” (Future Grace, 151-152)."
For all of us have become like one who is unclean, And all our righteous deeds are like a filthy garment; And all of us wither like a leaf, And our iniquities, like the wind, take us away.
...equip you in every good thing to do His will, working in us that which is pleasing in His sight, through Jesus Christ, to whom be the glory forever and ever. Amen.
"It is only when we recognize that the obedience of the believer really does matter, and that we really can please our Father, that the rewards passages in the Bible will make any sense."
Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord, knowing that your toil is not in vain in the Lord.
1 Corinthians 15:58
Now he who plants and he who waters are one; but each will receive his own reward according to his own labor.
1 Corinthians 3:8