TgO Ex5:7 :יֵיזְלוּן וִיגָבְבוּן לְהוֹן תִבנָא‏ : they must go and rake the straw themselves
See the entire entry for gbb vb. to bend; D to rake, gather

TgO Ex5:7var. :יהכון ויגבון לְהוֹן תִבנָא‏ : they should go and gather straw for themselves
See the entire entry for hlk vb. to go; D to walk