Валялся

20 И привели́ его́ к Нему́.

20 And [bring, brought] [his, him, it] [to, for, by] [Him, His].

Как ско́ро [беснова́тый] уви́дел Его́,

[How, What, As, Like (comparison)] [forthwith, immediately, quickly, soon] [possessed] [had seen, saw, seeing, seen, seeth] [His, Him, It],

дух сотря́с его́;

spirit [convulsed, convulsing, shook] [his, him, it];

он упа́л на зе́млю и валялся,

he fell [at, by, in, it, on the, to, toward, upon] [earth, land] and валялся,

испуская пе́ну.

испуская [foam, foameth, foams, froth, lather, suds].

And they brought the boy to him.
And when the spirit saw him,
immediately it convulsed the boy,
and he fell on the ground and rolled about,
foaming at the mouth.
Mark 9:20 ESV

And they brought him unto him:
and when he saw him,
straightway the spirit tare him;
and he fell on the ground,
and wallowed foaming.
Mark 9:20 KJV