David. R. Goodworth explores saying 5.3/Th76 from his book 'The Gospel of Thomas: Evolution'.

Jesus said, “The kingdom of the Father is like a rich merchant who

found a pearl. That merchant was wise. He sold all his other goods and

bought the one pearl for himself. You also seek after the treasure

which does not perish but endures, where no moth comes near to eat

it and no worm destroys (it).”