Bamidbar 5:20

20 But if thou hast turned astray to another instead of thy ish, and if thou be defiled, and some man have lain with thee other than thine ish;

Bamidbar 5:20 Meaning and Commentary

Numbers 5:20

But if thou hast gone aside to another instead of thy
husband
Gone aside from the paths of modesty and chastity, and betook herself to another man's bed instead of her husband's:

and if thou be defiled,
by committing adultery:

and some man hath lain with thee beside thy husband;
these phrases are all synonymous, and a heap of words are made use of to express the sin, and that there might be no evasion of it, and that it might be clear what was intended, this being said on oath.

Bamidbar 5:20 In-Context

18 And the kohen shall set the isha before Hashem, and unbind the hair of the isha, and put the minchat zekaron in her hands, which is the minchat kena’ot; and the kohen shall have in his hand the mei hamarim hame’ararim (waters of bitterness that causeth the curse);

19 And the kohen shall put her under oath, and say unto the isha, If no man have lain with thee, and if thou hast not turned astray to tum’a (uncleanness, impurity) with another instead of thy husband, be thou free from these mei hamarim hame’ararim;

20 But if thou hast turned astray to another instead of thy ish, and if thou be defiled, and some man have lain with thee other than thine ish;

21 Then the kohen shall put the isha under oath with the oath of the curse, and the kohen shall say unto the isha, Hashem make thee an alah (curse) and a shevu’ah (oath) among thy people, when Hashem doth make thy thigh to waste away, and thy belly to swell;

22 And this mayim that causeth the curse shall go into thy inner parts, to make thy belly to swell, and thy thigh to waste away; And the isha shall say, Omen, Omen.