'Sons' in the Bible

For it was fitting that He for whom, and through whom, all things exist, after He had brought many sons to glory, should perfect by suffering the Prince Leader who had saved them.

Through faith Jacob, when dying, blessed each of Joseph's sons, and, leaning on the top of his staff, worshipped God.

and you have quite forgotten the encouraging words which are addressed to you as sons, and which say, "My son, do not think lightly of the Lord's discipline, and do not faint when He corrects you;

The sufferings that you are enduring are for your discipline. God is dealing with you as sons; for what son is there whom his father does not discipline?

And if you are left without discipline, of which every true son has had a share, that shows that you are bastards, and not true sons.