'Sides' in the Bible

For he had dominion over all [the region] on this side the River, from Tiphsah even to Gaza, over all the kings on this side the River: and he had peace on all sides around him.

Elijah came near to all the people, and said, "How long will you waver between the two sides? If Yahweh is God, follow him; but if Baal, then follow him." The people answered him not a word.