Therefore came all the elders of Israel to the king to Hebron; and David made a covenant with them in Hebron before the LORD; and they anointed David king over Israel, according to the word of the LORD by Samuel.
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George Leo Haydock
Which he spoke, is not expressed in Hebrew or Septuagint. Samuel complied with the injunction, by anointing David, 1 Kings xvi. 13. He also wrote an account of this memorable transaction, which translated the sceptre from one family to another. (Haydock)
It is, on this account, that the author here takes particular notice of God's decree. (Kennicott)