Deuteronomy 22:30

30 `A man doth not take his father's wife, nor uncover his father's skirt.

Deuteronomy 22:30 Meaning and Commentary

Deuteronomy 22:30

A man shall not take his father's wife
Not marry her, whether his own mother, or a stepmother; or even, as Aben Ezra thinks, anyone that was deflowered by his father. Jarchi interprets it of his father's brother's wife, which he was obliged to marry by virtue of the law in ( Deuteronomy 25:5 )

nor discover his father's skirt;
or lie with her his father had thrown his skirt over, or married; and which being the first, is mentioned here as a sample to all the rest forbidden ( Leviticus 18:7 ) or, as Bishop Patrick expresses it, is a "short memorandum", to make them careful to observe all the other laws respecting incestuous marriages and copulations there delivered.

Deuteronomy 22:30 In-Context

28 `When a man findeth a damsel, a virgin who is not betrothed, and hath caught her, and lain with her, and they have been found,
29 then hath the man who is lying with her given to the father of the damsel fifty silverlings, and to him she is for a wife; because that he hath humbled her, he is not able to send her away all his days.
30 `A man doth not take his father's wife, nor uncover his father's skirt.
Young's Literal Translation is in the public domain.