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2 Samuel 23:4ESV·author unknown

he dawns on them like the morning light, like the sun shining forth on a cloudless morning, like rain that makes grass to sprout from the earth.

John Gill Reformed Baptist @doctorgill

And he shall be as the light of the morning, when the sun riseth, even a morning without clouds,.... That is, such a ruler that rules in righteousness, and in the fear of God; he is the light and glory of his people, who guides and directs them, makes them cheerful and comfortable; his administrations are pleasant and delightful, and promise a growing and increasing...

Geneva Bible Notes Reformed @genevanotes

And [he shall be] as the light of the morning, [when] the sun riseth, [even] a morning without clouds; [as] the tender grass [springing] out of the earth by clear shining after rain. (c) Which grows quickly, and fades soon.

Adam Clarke Methodist @methodicalclarke

He shall be as the light of the morning - This verse is very obscure, for it does not appear from it who the person is of whom the prophet speaks. As the Messiah seems to be the whole subject of these last words of David, he is probably the person intended. One of Dr. Kennicott's MSS.