Question on Hebrews 12:6

The word in Hebrews 12:6 is "scourge." Whoever wrote Hebrews probably was familiar with the passage in the Greek. Many books of the OT may not have even existed in Hebrew at the time of Christ, so many people used the Greek translation of the older books too.

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Hebrews 12:5 PP3

Hebrews 12:6

For whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth.


[For whom the Lord loveth he chasteneth] Here is the reason why we should neither neglect correction, nor faint under it: it is a proof of the fatherly love of God Almighty, and shows his most gracious designs toward us; from which we may be fully convinced that the affliction will prove the means of good to our souls, if we make a proper use of it.
[And scourgeth every son whom he receiveth.] Mastigoi (grk 3146) de (grk 1161) panta (grk 3956) huion (grk 5207), hon (grk 3739) paradechetai (grk 3858). This is a quotation, literatim from the Septuagint, of <Prov. 3:12>, of which place our version is: Even as the father the son in whom he delighteth. But, howsoever near this may appear to be the Hebrew, it bears scarcely any affinity to the apostle's words. The Hebrew text is as follows uwk'aab (heb 1) 'et (heb 853) been (heb 1121) yirtseh (heb 7521). Now, uwk'aab (heb 1) may be a noun, compounded of the Hebrew conjunction waw (wª-), "and," the Hebrew comparative particle kª-, "as" or "like;" and 'ab (heb 1), "a father:" or it may be the third person preterite Qal of kaa'ab (heb 3510), "he spoiled, wasted, marred, ulcerated," compounded with the Hebrew conjunction waw (wª-), "and." And in this sense the Septuagint most evidently understood it; and it is so understood by the Arabic; and both readings seem to be combined by the Syriac and Chaldee versions. And as to raatsah (heb 7521), one of its prime meanings is to accept, to receive graciously, to take into favour; the translation, therefore, of the Septuagint and apostle is perfectly consonant to the Hebrew text, and our version of <Prov. 3:12> is wrong.
(from Adam Clarke Commentary)