'Jungle' in the Bible

[The Lord rebukes Jeremiah for his impatience, saying] “If you have raced with men on foot and they have tired you out,Then how can you compete with horses?If you fall down in a land of peace [where you feel secure],Then how will you do [among the lions] in the [flooded] thicket beside the Jordan?

There is a sound of the shepherds’ wail,For their splendor (grazing land) is ruined;There is a sound of the young lions’ roar,For the pride of the Jordan is ruined.