Rashi on Exodus 21:22/רש"י על שמות כ״א:כ״ב

1וכי ינצו אנשים IF MEN STRIVE with each other and one intended to strike the other and inadvertently struck the woman (Sanhedrin 79b).

2ונגפו AND HURT [A WOMAN WITH CHILD] — The root נגף always signifies “dashing against” and “striking”. Examples are: (Psalms 91:15) “lest thou dash (תגוף) thy foot against a stone”; (Jeremiah 13:16) “and before your feet dash (יתנגפו)”; (Isaiah 8:14) “but for a stone of dashing (נגף).

3ולא יהיה אסון AND YET THERE BE NO MISCHIEF — no further mischief with the woman (Sanhedrin 79b).

4ענוש יענש HE SHALL SURELY BE AMERCED to pay the value of the offspring to the husband. We estimate her value according to what she is worth if she were sold as a slave in the market giving her a higher value on account of her being with child (Bava Kamma 49a).

5ענוש יענש (lit., he shall surely be punished) — It means that they shall exact money from him. ענוש is used here in the same sense as in, (Deuteronomy 22:19) “And they shall amerce (וענשו) him an hundred shekel of silver”.

6כאשר ישית עליו וגו׳ means, when the husband will summons him before the Court that they should place upon him a fine for this (cf. Mekhilta),

7ונתן THEN HE SHALL GIVE — i. e. the man that struck the woman shall give the value of the offspring.

8בפללים ACCORDING TO THE DECISION OF THE JUDGES (Mekhilta).