Isaiah 38:3-6 - WEB
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and said, Remember now, Yahweh, I beg you, how I have walked before you in truth and with a perfect heart, and have done that which is good in your sight. Hezekiah wept sore.
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Then came the word of Yahweh to Isaiah, saying,
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Go, and tell Hezekiah, Thus says Yahweh, the God of David your father, I have heard your prayer, I have seen your tears: behold, I will add to your days fifteen years.
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I will deliver you and this city out of the hand of the king of Assyria; and I will defend this city.
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