Deuteronomy 32:43 ESV, Luke 2:13-14 ESV and Hebrews 1:6 ESV

http://blog.stocksohio.com/2009/06/29/monday-morning-prophecy-11-angels-would-praise-him/
In this article we look at the Old Testament prophecy, and New Testament fulfillment, that angels would praise the Christ at his birth.