We must consider the fact that God The Father told Moses that none could see His face and live. Thus, we must re-consider which of the Holy Trinity appeared to Abraham. However, since we don't know anything about the HT besides what's in Scripture, we can only guess. What IS for sure is that it was GOD who appeared to Abe.

But back to the OP. Clearly God The Father was speaking to God The Son, and David knew it. Nowhere does David call any angel "lord".

"robycop3 - The avowed enemy of ALL man-made doctrines of worship!"