Deuteronomy 4:20 recalls the iron furnace of Egypt, the same oppression referenced here as harsh treatment.

Exodus 1:11 describes the taskmasters and hard labor, the specific oppression mentioned here as laying on hard labor.

Exodus 1:14 elaborates on the bitter hard service in mortar and brick, matching the harsh treatment in this verse.

Exodus 1:16 commands killing Hebrew male infants, part of the same Egyptian oppression that this verse summarizes as harsh treatment.

Exodus 1:22 records Pharaoh's decree to kill Hebrew sons — a specific example of the harsh treatment described here.

Exodus 5:9 shows Pharaoh increasing the labor burden, directly illustrating the 'hard labor' mentioned here.

Exodus 2:23 describes the Israelites groaning under slavery, directly matching the 'harshly treated' and 'hard labor' here.

Exodus 20:2 declares God brought Israel out of slavery — a direct contrast to the oppression described here.

Numbers 20:15 repeats nearly the same phrase about Egyptians dealing harshly, reinforcing the historical summary.

Exodus 5:19 reveals the foremen realizing their trouble from the increased labor, echoing the humiliation and hard labor.

Exodus 5:23 has Moses lamenting that Pharaoh has 'done evil' to the people, reflecting the harsh treatment here.