Hosea 12:11

What was going on in Gilead was an example of Israel’s depravity (cf. Hosea 6:8-9). In Gilgal, too, worthless Israelites were sacrificing bulls, expensive offerings, on numerous altars that they had built there. The use of Gilead, on the west side of the Jordan, and Gilgal, on the east side, did not just represent the whole nation. It also provided a rhetorical parallelism since the two names sound similar (assonance). The number of the pagan altars at Gilgal was as great as the piles of stones that the farmers gathered beside their furrows. These altars would become simply piles of stones. There is a play on the name "Gilgal," which sounds like the Hebrew word gallim, meaning "pile of stones."

The land that Israel occupied had very stony ground, and when farmers plowed they often hit stones that they had to remove from the fields. Evidently they would pile these stones beside their furrows.