'Sons' in the Bible

He will sit as a refiner and purifier of silver, and He will purify the sons of Levi [the priests], and refine them like gold and silver, so that they may present to the Lord [grain] offerings in righteousness.

“For I am the Lord, I do not change [but remain faithful to My covenant with you]; that is why you, O sons of Jacob, have not come to an end.