Beloved in Christ, greetings to you in the name of our loving Lord Jesus Christ.
We very well know the life of Joseph, the son of Jacob. Joseph was sold into slavery by his own brothers, because of jealousy. He was then taken to the land of Egypt where he spent the rest of his life. God being truthful to what He had promised Joseph, made him the second most powerful man in Egypt. While in Egypt, Joseph begot two sons Ephraim and Manasseh. These two sons of Joseph would have probably heard about Jacob, their grandad, but wouldn't have seen him. Ephraim and Manasseh were Joseph's sons until Joseph was away from Jacob. But, when Jacob came to Egypt to be with Joseph he adopted Ephraim and Manasseh to be his own sons. Thus, just like Jacob's own sons, Ephraim and Manasseh also became his sons. Let us read Genesis 48:5