And Jacob said unto Joseph, God Almighty appeared unto me at Luz in the land of Canaan, and blessed me,

Wesley's Notes

48:3 God blessed me - And let that blessing be entailed upon them. God had promised him two things, a numerous issue, and Canaan for an inheritance. And Joseph's sons, pursuant hereunto, should each of them multiply into a tribe, and each of them have a distinct lot in Canaan, equal with Jacob's own sons. See how he blessed them by faith in that which God had said to him Heb 11:21.

Jamieson-Fausset-Brown Bible Commentary

3, 4. God Almighty appeared unto me at Luz-The object of Jacob, in thus reverting to the memorable vision at Beth-el [Ge 28:10-15]-one of the great landmarks in his history-was to point out the splendid promises in reserve for his posterity-to engage Joseph's interest and preserve his continued connection with the people of God, rather than with the Egyptians.

Matthew Henry's Concise Commentary

48:1-7 The death-beds of believers, with the prayers and counsels of dying persons, are suited to make serious impressions upon the young, the gay, and the prosperous: we shall do well to take children on such occasions, when it can be done properly. If the Lord please, it is very desirable to bear our dying testimony to his truth, to his faithfulness, and the pleasantness of his ways. And one would wish so to live, as to give energy and weight to our dying exhortations. All true believers are blessed at their death, but all do not depart equally full of spiritual consolations. Jacob adopted Joseph's two sons. Let them not succeed their father, in his power and grandeur in Egypt; but let them succeed in the inheritance of the promise made to Abraham. Thus the aged dying patriarch teaches these young persons to take their lot with the people of God. He appoints each of them to be the head of a tribe. Those are worthy of double honour, who, through God's grace, break through the temptations of worldly wealth and preferment, to embrace religion in disgrace and poverty. Jacob will have Ephraim and Manasseh to know, that it is better to be low, and in the church, than high, and out of it.