'Reference' in the Bible

investigating for what [person] or which time the Spirit of Christ in them was indicating [when he] testified beforehand to the sufferings with reference to Christ and the glories after these [things],

to whom it was revealed that they were serving not themselves but you with reference to the same [things] which now have been announced to you through those who proclaimed the gospel to you by the Holy Spirit sent from heaven, {things into which} angels desire to look.