The number of angels is enormous. Jacob meets a host of angels; Joshua sees the "captain of the host of the Lord"; God sits on His throne, "all the host of heaven standing by Him on His right hand and on his left"; the sons of God come "to present themselves before the Lord" (Gen. xxxii. 2; Josh. v. 14, 15; I Kings, xxii. 19; Job, i. 6, ii. 1; Ps. lxxxix. 6; Job, xxxiii. 23). The general conception is the one of Job (xxv. 3): "Is there any number of his armies?" In the book of Revelation, the number is "a thousand thousands, and many tens of thousands". 

Though the older writings usually mention one angel of the Lord, embassies to men as a rule comprised several messengers. The inference, however, is not to be drawn that God Himself or one particular angel was designated: the expression was given simply to God's power to accomplish through but one angel any deed, however wonderful.