not to all the people, but unto witnesses that were chosen before of God, even to us, who ate and drank with him after he rose from the dead.

Not by all the people, but by witnesses marked out before by God, even by us, who took food and drink with him after he came back from the dead.

ουχι εις παντα τον λαον, αλλ' εις μαρτυρας τους προδιωρισμενους υπο του Θεου, εις ημας, οιτινες συνεφαγομεν και συνεπιομεν μετ' αυτου, αφου ανεστη εκ νεκρων·

Not to all the people, but unto witnesses chosen before of God, even to us, who did eat and drink with him after he rose from the dead.