Mark 9:18 previously described the same symptoms (foaming, convulsing) that now occur before Jesus.

Mark 9:26 shows the final convulsion when the spirit departs, completing the exorcism begun in 9:20.

Mark 1:26 records a similar demonic convulsion during Jesus' first exorcism, showing a consistent pattern.

Luke 4:35 shows a demon throwing a man down before leaving — same violent convulsion pattern as here.

Luke 9:42 recounts the same event: the demon throws the boy down and convulses him — a direct parallel account.

Matthew 17:15 adds that the boy often falls into fire or water — same event with extra detail on the seizures.

Luke 9:39 describes the same convulsions and foaming — another gospel's account of the identical episode.

Luke 8:29 describes a demon-possessed man violently seized — adds another example of demonic physical attack, though not identical.