'Messengers' in the Bible

And when the messengers of John were departed, he began to speak unto the people concerning John, What went ye out into the wilderness for to see? A reed shaken with the wind?

And sent messengers before his face: and they went, and entered into a village of the Samaritans, to make ready for him.

Whether any do inquire of Titus, he is my partner and fellowhelper concerning you: or our brethren be inquired of, they are the messengers of the churches, and the glory of Christ.

Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent them out another way?