'Sent' in the Bible

Are they not all helping spirits, who are sent out as servants to those whose heritage will be salvation?

Who in the days of his flesh, having sent up prayers and requests with strong crying and weeping to him who was able to give him salvation from death, had his prayer answered because of his fear of God.

By faith Rahab, the loose woman, was not put to death with those who had gone against God's orders, because she had taken into her house in peace those sent to see the land.

But, brothers, take kindly the words which I have said for your profit; for I have not sent you a long letter.