1 Kings 12:11

And now whereas my father did lade you with a heavy yoke, I will add to your yoke: my father hath chastised you with whips, but I will chastise you with scorpions.

Whips ... scorpions. The latter, as contrasted with the former, are supposed to mean thongs thickly set with hard knots and sharp iron points, used in the castigation of slaves; sometimes in after-times inflicted on Christian martyrs [Septuagint, skorpiois]. Scourging was performed by prostrating the victim on the ground at full length; while his limbs were kept down by force, a person with a whip lashed him on the bare back. The whip having several lashes, accords with the account of the Jews, that theirs had 3 thongs, 13 strokes of which gave 39 lashes. It is thought by some that this was what was meant by "scorpions," inflicted usually on slaves: and if so, the taunt of Rehoboam implied that he would be a despot, and treat his subjects as serfs.