Rashi on Exodus 21:18/רש"י על שמות כ״א:י״ח

1וכי יריבן אנשים AND IF MEN QUARREL — Why is this (vv. 18, 19) stated in this particular form? Since Scripture states, (v. 24) “Eye for eye”, we learn from this only that compensation for the loss of limbs has to be paid, but we cannot infer from it that indemnity for loss of time (during which the injured has been disabled from work) and cost of medical treatment have also to be paid; consequently this section (vv. 18 and 19) is said (Mekhilta).

2ונפל למשכב BUT KEEPETH HIS BED — The meaning is as the Targum gives it: ויפל לבוטלן “and he falls into inactivity”, i. e. he falls into an illness that prevents him from working.