Verse 28 is not a repeat of verse 26!
26 And God saith, `Let Us make man in Our image, according to Our likeness, and let them rule over fish of the sea, and over fowl of the heavens, and over cattle, and over all the earth, and over every creeping thing that is creeping on the earth.'
28 And God blesseth them, and God saith to them, `Be fruitful, and multiply, and fill the earth, and subdue it, and rule over fish of the sea, and over fowl of the heavens, and over every living thing that is creeping upon the earth.'
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At-a-glance/The Bible/101