The response to Isaac"s blessing in Genesis 27:23 is proleptic; it refers to the blessing in Genesis 27:27-29, not another blessing that preceded that one. [source][source][source]
Jacob"s kiss recalls another deceptive show of affection, namely, Judas" kiss of Jesus ( Matthew 26:48-49). [source][source][source]
Isaac uttered his blessing ( Genesis 27:27-29) in poetic language and God"s Spirit doubtless inspired it since it proved to be prophetic (cf. Genesis 49:1-27; Deuteronomy 33; et al.). It was an oracle. [source][source][source]
The writer mentioned two of the elements in the Abrahamic promises specifically here: possession of the land, and numerous descendants. He generalized the third element, the blessing of the nations, in Genesis 27:29 c. [source][source][source]
"Since the intention to give the blessing to Esau the firstborn did not spring from proper feelings toward Jehovah and His promises, the blessing itself, as the use of the word Elohim instead of Jehovah or El Shaddai (cf. xxviii3) clearly shows, could not rise to the full height of the divine blessings of salvation, but referred chiefly to the relation in which the two brothers and their descendants would stand to one another, the theme with which Isaac"s soul was entirely filled. It was only the painful discovery that, in blessing against his will, he had been compelled to follow the saving counsel of God, which awakened in him the consciousness of his patriarchal vocation, and gave him the spiritual power to impart the "blessing of Abraham" to the son whom he had kept back, but whom Jehovah had chosen, when he was about to send him away to Haran (xxviii3 , 4)." [1][source]