Jacob dwelt in the land
wherein his father was a stranger, in the land of Canaan.
2 These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brethren; and the lad was with the sons of Bilhah, and with the sons of Zilpah, his father's wives: and Joseph brought unto his father their evil report.
3 Now Israel loved Joseph more than all his children, because he was the son of his old age: and he made him a coat of many colours.
4 And when his brethren saw that their father loved him more than all his brethren, they hated him, and could not speak peaceably unto him.
5 ķAnd Joseph dreamed a dream, and he told it his brethren: and they hated him yet the more.
6 And he said unto them, Hear, I pray you, this dream which I have dreamed:
7 For, behold, we were binding sheaves in the field, and, lo, my sheaf arose, and also stood upright; and, behold, your sheaves stood round about, and made obeisance to my sheaf.
8 And his brethren said to him, Shalt thou indeed reign over us? or shalt thou indeed have dominion over us? And they hated him yet the more for his dreams, and for his words.
9 And he dreamed yet another dream, and told it his brethren, and said, Behold, I have dreamed a dream more; and, behold, the sun and the moon and the eleven stars made obeisance to me.
10 And he told it to his father, and to his brethren: and his father rebuked him, and said unto him, What is this dream that thou hast dreamed? Shall I and thy mother and thy brethren indeed come to bow down ourselves to thee to the earth?
is obvious from Jacob's comment
that he knew he and his children were indeed sons of God, i.e. angels,
who had previously spent time in heaven.
He may have doubted whether Joseph actually had the dream, but he knew what it meant, if he had indeed dreamt it!
11 And his brethren envied him; but his father observed the saying.
You can read the rest of chapter 37 in your Bible on your own, but remember Joseph's descendants were destined to and became the Christian nations of the world, led in the 20th and, to date the 21st centuries A.D., by the United States of America.
Live Link to- Genesis chapter 37
See (live link-) to-From House of Israel to Christian Nations of the World