John Gill Commentary Genesis 35:11

"And God said unto him, I am God Almighty: be fruitful and multiply; a nation and a company of nations shall be of thee, and kings shall come out of thy loins;" — Genesis 35:11 (ASV)

And God said to him, I [am] God Almighty
And so able to protect and defend him, and to fulfil all promises made to him, and to supply him with everything he wanted; being, as some choose to render the word, "God all sufficient", having a sufficiency of all good things in him to communicate to his people:

be fruitful and multiply ;
which carries in it a promise or prophecy that he should increase and multiply, though not he himself personally, he having but one son born after this, yet in his posterity:

a nation, and a company of nations, shall be of thee ;
the nation of Israel, called so after his name, and the twelve tribes, which were as so many nations, of which the above nation consisted:

and kings shall come out of your loins ;
as Saul, David, Solomon, and, many others, who were kings of Israel and of Judah, and especially the King Messiah; yea, all his posterity were kings and priests, or a kingdom of priests, (Exodus 19:6) .