Exodus 23:20-21
"And the angel of the LORD appeared unto the woman, and said unto her,
Behold now, thou art barren, and bearest not: but thou shalt conceive, and bear a son."
Judges 13:3
"...And the angel of the LORD said unto him, Why askest thou thus after my name, seeing it is secret?"
Judges 13:17
"Tell me by what angel thou art frustrated." And he answered: "By the holy and precious name of the Almighty God, called by the Hebrews by a row of numbers,
of which the sum is 644, and among the Greeks it is Emmanuel."
Testament of Solomon 29
"So I said to him: "I adjure thee in the name of the God Sabaoth, to tell me by what name thou art frustrated along with thy host." And the spirit answered me: "The 'great among men,' who is to suffer many things at the hands of men, whose name is the figure 644, which is Emmanuel; he it is who has bound us, and who will then come and plunge us from the steep under water."