Psalm 110:5 - Did David Claim the Messiah is Jehovah?

The Lord is at your right hand. He will crush kings in the day of his wrath. -- Psalm 110:5, World English.

Some refer to Psalm 110:5 as proof that Jesus is Jehovah, or a person of Jehovah. The claim appears to be that since David's Lord is spoke of as being at the right hand of Jehovah in Psalm 110:1, that Jehovah is depicted as being at the right hand of Jehovah in Psalm 110:5 must be referring to the Messiah as the second person Jehovah, sitting at the right hand of the first person of Jehovah. Of course, one has to add a lot of assumptions to the what is said in Psalm 110:1,5 in order to "see" any idea of the alleged trinity at all.

The Masoretic text does not have the Holy Name in this verse; it has what is often transliterated as "adonay/adonai."
http://qbible.com/hebrew-old-testament/psalms/110.html#5

The original Hebrew, however, does not actually have ADONAY anywhere. In the ancient Hebrew, there is no distinction between adonay and adony. They are both represented exactly the same in the ancient Hebrew, both words appear by what could be transliterated as 'DNY or 'DNJ (some give it as 'DNI). Strictly, this means "my Lord." Nevertheless, it is not inherent in the original Hebrew text that David's intent was to use 'DNY here was to speak of Jehovah or of the Messiah whom Jehovah anoints. (Isaiah 61:1; It could be understood that David stated to Jehovah: "My lord is at your right hand." 

However, Ginsburg's findings indicate that the copyists may have changed the Holy Name to Adonai in this verse, if this so, then it should read as:

Jehovah is at your right hand. He will crush kings in the day of his wrath. -- Psalm 110:5.

As we have pointed out elsewhere, however, Ginsburg's conclusions are not always correct. It could be that the Hebrew for "my Lord" was what David originally wrote. At the same time, it could be the David did originally write the Tetragrammaton of God's Holy Name and it was later changed.

If the World English is correct, then it would be David speaking to Jehovah, saying that his lord is at the right hand of Jehovah. If Ginsburg is correct, then it would be David saying to his lord of verse 1 that Jehovah is at the right hand of his lord. This would simply mean that Jehovah is at the right hand Jehovah as the source of the Messiah's strength. (Micah 5:4) Either way, there is nothing in the verse that would mean that we need to add to what is said that Jehovah of Psalm 110:1 refers to the first person of Jehovah a while David's Lord refers to the second person of Jehovah, etc.

There is definitely nothing in Psalm 110:5, or anywhere else in the Bible, that says that Jehovah is more than one person, or that Jehovah is three persons. No such concept is ever introduced anywhere in the faith once delivered to the saints. (Jude 1:3) To add such a concept to the Bible, would, in effect, be following another spirit, especially since that concept tends to deny the purpose for which Christ came into the world. -- 2 Corinthians 11:4; John 3:17; 6:51; Hebrews 10:10; 1 John 4:3,9,10,14.

Related:

Hebrew Analysis of Psalm 110:5