Yet again we have the list maker tying multiple claims to a psalm that in no way fits Jesus. This is the second of four claims tied to T'hillim / Psalm 72 which we are clearly told is about King Solomon!
T'hillim / Psalm 72:1: "Concerning Solomon. O G-d, give Your judgments to a king and Your righteousness to a king's son."
These are the words of King David on his deathbed. He writes a psalm. . . a poem. . . a prayer on behalf of his beloved son, and heir, Solomon. David is speaking of Solomon's reign as the king of Israel who will follow him. He asks for peace, and in verse 16 "May there be an abundance of grain in the land, on the mountain peaks; may its fruit rustle like Lebanon, and they will blossom forth from the city like the grass of the earth."
This is a prayer, not a prophecy.
And how on earth would John 12:24 be a prophetic fulfillment when it simply says "Truly, truly, I say to you, unless a grain of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit."
In other words -- John is quoting Jesus as saying that to grow new fruit you have to plant a seed. (The Jesus Seminar thought this was a later insertion which Jesus never said). A seed which isn't planted doesn't grow. A dead seed also does not grow.
OK, makes sense.
But how is this messianic, let alone a prophecy? It is again a universal truth for ALL living things.
In the psalm, in verse 16 "May there be an abundance of grain in the land, on the mountain peaks; may its fruit rustle like Lebanon, and they will blossom forth from the city like the grass of the earth." King David prays for the success of his son's kingship -- may there be enough food for the people, may there be peace in the land.
This passage is not a messianic prophecy. It describes David's prayer to G-d and blessing of abundance that will abide in the days of Solomon's rule.