Luke
Acts 1:18ESV·traditional attribution

(Now this man acquired a field with the reward of his wickedness, and falling headlong he burst open in the middle and all his bowels gushed out.

John Calvin Reformed @genevareformer

18. And he truly It seemeth unto me a thing like to be true, that this narration of the death of Judas was put in by Luke; therefore, it seemeth good to me to include it within a parenthesis, that it may be separated from Peter’s sermon. For to what end should Peter here reckon up unto the disciples those things which they already knew well enough?

Matthew Henry Presbyterian @wholebiblehenry

The sin of Judas was not only his shame and ruin, but it made a vacancy in the college of the apostles. They were ordained twelve, with an eye to the twelve tribes of Israel, descended from the twelve patriarchs; they were the twelve stars that make up the church's crown (Rev 12:1), and for them twelve thrones were designated, Mat 19:28.

Commenting on Acts 1:15-26

John Gill Reformed Baptist @doctorgill

Now this man purchased a field,.... This verse, with the following, seem to be the words of Luke the historian, which should be read in a parenthesis; for there was no need to have acquainted the disciples with the manner of Judas's death, which was so well known to all the inhabitants of Jerusalem; nor would Jerusalem, and the inhabitants of it, be mentioned with...