Mark 4:28
For the earth bringeth forth fruit of herself; first the blade, then the ear, after that the full corn in the ear.
Cross-reference
Mark 4:32
Parallel
Mark 4:32 describes the mustard seed's final large plant, showing the outcome of the growth process initiated in v28.
Matthew 13:26
Parallel
Matthew 13:26 describes wheat sprouting and forming heads—the same growth stage language as Mark 4:28's stalk, head, kernel.
Isaiah 61:11
Allusion
Isaiah 61:11 uses the same soil-growth image to describe God causing righteousness and praise to spring up.