Contradiction with Matthew 7:6
This verse suggests withholding teachings from those who are unworthy, while Luke 8:4 implies sharing the parable with a large crowd indiscriminately.
Matthew 7:6: Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.
Contradiction with Matthew 13:11
Here, Jesus indicates that the mysteries of the kingdom are given only to the disciples, contrasting with the open sharing of parables in Luke 8:4 with a general audience.
Matthew 13:11: He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.