Shared ground
Numbers 5:29–31 functions as a closing legal summary for the jealousy procedure described in the earlier verses (5:11–28). The passage explicitly frames the ritual as a defined rule (“the law of jealousy”) and restates when it applies: (1) when a wife “goes aside” and becomes “defiled,” and (2) when a husband is overtaken by jealousy toward his wife.
The text also explicitly locates the process “before Yahweh” and under priestly administration: the husband presents the woman, and the priest carries out “all this law,” meaning the already-given steps rather than an improvised test.
Finally, the passage explicitly assigns responsibility at the end: the husband is “free from iniquity,” while the woman “bears her iniquity” (using the passage’s own responsibility language; iniquity).
Where interpretation differs (only where needed)
One main question is what “defiled” covers in this summary line. Some readers take it as a direct reference to sexual unfaithfulness, since that is the suspected issue in the surrounding procedure. Others note that the summary itself does not define the exact act and simply points back to the earlier ritual description for specifics.
A second question is what “spirit of jealousy” means. Some read it as the husband’s internal emotion (suspicion/jealousy). Others think the wording could imply something more than emotion, but the closing summary does not clarify beyond stating that jealousy can trigger the procedure.
A third question is how “bear her iniquity” connects to outcomes. Some understand it primarily as the woman suffering the consequence that the ritual reveals/enacts if she is guilty. Others emphasize that the phrase is a standard way of describing responsibility and consequence, and that the exact shape of those consequences depends on the earlier procedure rather than these closing lines.
Why the disagreement exists
These verses are condensed and refer back to “all this law” instead of repeating the details. That makes key terms (“defiled,” “spirit of jealousy,” “bear her iniquity”) sound weighty while still depending on the surrounding context for their precise meaning.
What this passage clearly contributes
This closing summary clarifies scope and authority: the jealousy case is handled through a set, priest-led procedure “before Yahweh,” not through private retaliation or ad hoc accusations. It also clarifies the text’s stated responsibility structure at the conclusion: the husband is not charged with wrongdoing for initiating the authorized process, while the woman carries the responsibility/outcome associated with her condition as established by the procedure.