Luke 8:10

He replied, “The knowledge of the mysteries of the kingdom of God has been given to you, but to others I speak in parables, so that, ‘though seeing, they may not see; though hearing, they may not understand.’

Note Isaiah 6:9 (See also LXX)

And he said, Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.

He said, “To you it is given to know the mysteries of God’s Kingdom, but to the rest it is given in parables, that ‘seeing they may not see, and hearing they may not understand.’

And he said, Unto you it is given to know the mysteries of the kingdom of God: but to the rest in parables; that seeing they may not see, and hearing they may not understand.