Charles Ellicott Commentary Mark 4:33-34

"And with many such parables spake he the word unto them, as they were able to hear it; and without a parable spake he not unto them: but privately to his own disciples he expounded all things." — Mark 4:33-34 (ASV)

And with many such parables.—See Notes on Matthew 13:34-35. St. Mark’s omission of the reference to Psalms 78:2, and his addition of as they were able to hear it, are, each of them, characteristic. It may be noted that the many such parables of St. Mark imply something like the series which we find in St. Matthew.