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Case file

Lifnei iver

In 2005 Wikipedia's first sentence called it “one of the 613 mitzvot”. Today it says “hebrew expression defining a prohibition against misleading people by use of a " stumbling block”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-02. In 2005 Wikipedia's first sentence called it “one of the 613 mitzvot”. Today it says “hebrew expression defining a prohibition against misleading people by use of a " stumbling block”.
We saved snapshots of this article over twenty years; you are reading the 2005 one. Red dashes: removed from Wikipedia since. Pale dots: rewritten; the numbered note shows what it says now. 1 tap a number or a side note to jump between them
The opening as it read in 2005

Lifnei iver ( Hebrew : "before the blind") is one of the 613 mitzvot (commandments) in Jewish law.1 It is based on: "Before the blind , do not put a stumbling block" ( Leviticus 19:14).2 It is one of the offenses spoken of in the Talmud as punishable by the Cherem . Many halakhic principles are derived from this commandment. The oral law expands the ramifications of this law from its literal sense. The Sifra (a midrash from the time of the Mishna ) states that, in its figurative sense, the commandment forbids one to give bad or damaging advice; after all, the receiving party is "blind" in this matter and will "stumble" as a result of the improper guidance (Sifra de-vei Rav, Kedoshim 2:14). It is therefore figurative for misleading anyone. The Talmud (tractate Avodah Zarah 6b) expands the principle to include giving anyone the means or opportunity to commit a sin where that person would otherwise lack these. Examples given there include giving a cup of wine to a person who has taken the nazirite vow (which forbids him/her to partake in wine or grape products). Lifnei iver as a principle recurs many times in practical Jewish law. The authoritative Shulkhan Arukh , for example, warns a father not to physically chastise older children, as this will only entice them to hit back, which is a capital offence (Shulkhan Arukh, Yorei Deah 240:20).3

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 16356747.
Today
In 2005 Wikipedia's first sentence called it “one of the 613 mitzvot”. Today it says “hebrew expression defining a prohibition against misleading people by use of a " stumbling block”. Read the current article and compare.
2005201020152020Oct '232025
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.

What Wikipedia says this is

Every article opens by defining its subject. This one was redefined between 2005 and 2025.

Then

one of the 613 mitzvot

Now

hebrew expression defining a prohibition against misleading people by use of a " stumbling block

Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.

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