Psalms 71:9

Cast me not off
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in the time
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of old age
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forsake
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me not when my strength
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faileth
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Psalms 102:23

He weakened
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my strength
<03581>

in the way
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he shortened
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my days
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{weakened: Heb. afflicted}

He hath shewed
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his people
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the power
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of his works
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that he may give
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them the heritage
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of the heathen
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Great
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[is] our Lord
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and of great
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power
<03581>_:

his understanding
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[is] infinite
<04557>_.

{his...: Heb. of his understanding there is no number}