It's about restrictions on the quartering (the placement and/or sheltering) of soldiers in private homes without the owner's consent, forbidding the practice in peacetime. The amendment is a response to the Quartering Acts passed by the Parliament of Great Britain during the buildup to the American Revolutionary War, which had allowed the British Army to lodge soldiers in public buildings.
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No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.
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No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.