Mark 4:4

And it came to pass, as he sowed, some fell by the way side, and the fowls of the air came and devoured it up.

Cross-reference

Mark 4:15 Citation

Mark 4:15 directly interprets the seed on the path: the word is snatched by Satan, just as birds devour the seed.

Matthew 13:4 is the parallel account of the same parable — identical event, reinforcing the detail of birds eating seed along the path.

Matthew 13:19 gives the same interpretation as Mark 4:15 — the path represents those who don't understand, and the evil one snatches the word.

Luke 8:5 Parallel

Luke 8:5 is the Lukan parallel — adds that the seed was also trampled, but birds devouring remains the same.

Luke 8:12 Parallel

Luke 8:12 interprets the path as those who hear but the devil takes the word to prevent belief — similar to Mark 4:15.