As if those words would be sung by Jesus and not David. Well, David prophesied those things in the Spirit, so, they are sung by Jesus :)
verse 9: "Yea, mine own familiar friend, in whom I trusted, which did eat of my bread, hath lifted up his heel against me."
John 13:18-19: "I speak not of you all: I know whom I have chosen: but that the scripture may be fulfilled, He that eateth bread with me hath lifted up his heel against me.
Now I tell you before it come, that, when it is come to pass, ye may believe that I am he."
21: "When Jesus had thus said, he was troubled in spirit, and testified, and said, Verily, verily, I say unto you, that one of you shall betray me."
25-26: "He then lying on Jesus' breast saith unto him, Lord, who is it? Jesus answered, He it is, to whom I shall give a sop, when I have dipped it. And when he had dipped the sop, he gave it to Judas Iscariot, the son of Simon."