כְּוִיָּה֙ תַּ֣חַת כְּוִיָּ֔ה פֶּ֖צַע תַּ֣חַת פָּ֑צַע חַבּוּרָ֕ה תַּ֖חַת חַבּוּרָֽה׃ (ס)
burning for burning, wound for wound, stripe for stripe.
Targum Jonathan on Exodus
all equivalent of the pain of burning for burning, and of wounding for wounding, and of blow for blow.