Восточному

1 Зако́нчив говори́ть э́то,

1 [Having Finished, Conclude] [to speak, to talk] [that, this, it],

Иису́с поки́нул Галиле́ю и отпра́вился по восточному берегу Иорда́на в Иуде́ю.

Jesus left Galilee and [departed, set off, went] [along, by, in, on, to, unto] восточному [coast, shore] Jordan [at, in, of, on] [Judaea, Judea].

Now when Jesus had finished these sayings,
he went away from Galilee and entered the region of Judea beyond the Jordan.
Matthew 19:1 ESV

And it came to pass,
that when Jesus had finished these sayings,
he departed from Galilee,
and came into the coasts of Judaea beyond Jordan;
Matthew 19:1 KJV