Albert Barnes on Acts 10:39

And we are witnesses. We who are apostles. Lk 24:48.

In the land of the Jews. In the country of Judea.

Whom they slew, etc. Our translation would seem to imply that there were two separate acts--first slaying him, and then suspending him. But this is neither according to truth nor to the Greek text. The original is simply, "whom they put to death, suspending him on a tree."

On a tree. On a cross. Acts 5:30.

(h) "we are witnesses" Lk 24:48, Acts 2:32 () "tree" "cross"