Luke
Acts 2:29ESV·traditional attribution

“Brothers, I may say to you with confidence about the patriarch David that he both died and was buried, and his tomb is with us to this day.

Matthew Henry Presbyterian @wholebiblehenry

We have here the first-fruits of the Spirit in the sermon which Peter preached immediately, directed, not to those of other nations in a strange language (we are not told what answer he gave to those that were amazed, and said, What meaneth this?) but to the Jews in the vulgar language, even to those that mocked; for he begins with the notice of that...

Commenting on Acts 2:14-36

John Gill Reformed Baptist @doctorgill

Men and brethren, let me freely speak unto you,.... The apostle calls the Jews, brethren, whom he before only styled men of Judea, and men of Israel, because they were his brethren according to the flesh, as many of them afterwards were in a spiritual relation; and the rather he adds this affectionate appellation to soften their minds, and prepare them to receive the account...

Albert Barnes Presbyterian @notesbybarnes

Verse 29. Men and brethren. This passage of the Psalms Peter now proves could not relate to David, but must have reference to the Messiah. He begins his argument in a respectful manner, addressing them as his brethren, though they had just charged him and the others with intoxication. Christians should use the usual respectful forms of salutation, whatever contempt and reproaches they may meet with from opposers.