That is… a stupefying description of what is written. I had to read the torah in primary school. Half a day, every school day, one book per year, (two for Leviticus), in Hebrew. I was confounded. I thought maybe Rabbi had us skip that part.
The part you are referring to is referred to as “Sota” which describes a magical ceremony where in a man would bring his allegedly unfaithful wife before a Beis Din, and she could drink a magic potion, snickeringly referred to as “sota water,” to prove her innocence. The logic goes that if the woman was unfaithful, “these afflictive waters shall enter your innards, causing your belly to swell and your thigh to rupture” . This could be taken mean an abortion, but in my grade school class, we were very giggly, because we thought it meant she would explode.
Further, the potion is described being water, dust from the tabernacle floor, and an invocation written down and dissolved in the water (Number 5: 17, and 23), and is explicitly stated it won’t hurt an innocent woman. (28). This passage does evoke abortion. But it describes a magical ritual that it claims will only cause abortion in unfaithful women, and the potion provided wont cause anyone to abort (although it is gross). Claiming in instructs an abortion is a massive stretch.