John Gill Commentary Luke 2:28

"then he received him into his arms, and blessed God, and said," — Luke 2:28 (ASV)

Then took he him up in his arms
That same Spirit that had revealed to him that he should not die till he saw the Messiah with his bodily eyes, and who by a secret impulse moved him to go to the temple just at this time, made known to him that the child which Joseph and Mary then brought into the temple to present to the Lord, was the Messiah.

Therefore, in a rapture of joy, he took him out of their arms into his own, embracing him with all affection and respect imaginable. Though some think he was a priest, and it being his office to present the firstborn to the Lord, he took him in his arms and did it, the former account seems more agreeable.

and blessed God ;
praised him, and gave glory to him, for his great goodness, in sending the promised Messiah, and long wished for Saviour; for his grace and favour, in indulging him with a sight of him; and for his truth and faithfulness in making good his promise to him.

and said ;
as follows.