(9) Twenty and four thousand.--In 1 Corinthians 10:8 the number of those who "fell in one day" is said to have been "three and twenty thousand." It has been supposed that a thousand were put to death by the judges, and that these were not included in St. Paul's enumeration. Presuming, however, that there has been no error in either place on the part of the scribes in recording the numbers, the words "in one day" may account for the apparent discrepancy.
Verse 9. - Were twenty and four thousand. "Fell in one day three and twenty thousand," says St. Paul (1 Corinthians 10:8). As the Septuagint does not deviate here from the Hebrew, the Apostle must have followed some Rabbinical tradition. It is possible enough that the odd thousand died on some other day than the one of which he speaks, or they may have died by the hands of the judges, and not by the plague.
25:6-15 Phinehas, in the courage of zeal and faith, executed vengeance on Zimri and Cozbi. This act can never be an example for private revenge, or religious persecution, or for irregular public vengeance.
And those that died in the plague were twenty and four thousand. The apostle says 23,000 1 Corinthians 10:8. Moses includes those that were hanged against the sun, in the time of the plague, as well as those that were taken off by it, even all that died on this account; the apostle only those that "fell", which cannot with propriety be said of those that were hanged, who might be 1000 and so their numbers agree; but of this and other ways of removing this difficulty See Gill on 1 Corinthians 10:8.