John Gill Commentary Genesis 48:3

"And Jacob said unto Joseph, God Almighty appeared unto me at Luz in the land of Canaan, and blessed me," — Genesis 48:3 (ASV)

And Jacob said to Joseph
Being come into his bedchamber, and sitting by him, or standing before him: God Almighty appeared to at Luz in the land of Canaan ;
the same with Bethel, where God appeared, both at his going to Padanaram, and at his return from thence, (Genesis 28:11–19) (35:6-12) ; which of those times is here referred to is not certain; very likely he refers to them both, since the same promises were made to him at both times, as after mentioned: and blessed me ;
promised he would bless him, both with temporal and spiritual blessings, as he did as follows.