KJV : And it came to pass, when Pharaoh <06547> would hardly <07185> (8689) let us go <07971> (8763), that the LORD <03068> slew <02026> (8799) all the firstborn <01060> in the land <0776> of Egypt <04714>, both the firstborn <01060> of man <0120>, and the firstborn <01060> of beast <0929>: therefore I sacrifice <02076> (8802) to the LORD <03068> all that openeth <06363> the matrix <07358>, being males <02145>; but all the firstborn <01060> of my children <01121> I redeem <06299> (8799).NASB : NASB# : 'It came<1961> about, when<3588> Pharaoh<6547> was stubborn<7185> about letting<7971> us go<7971>, that the LORD<3068> killed<2026> every<3605> firstborn<1060> in the land<776> of Egypt<4714>, both<4480> the firstborn<1060> of man<120> and the firstborn<1060> of beast<929>. Therefore<5921><3651>, I sacrifice<2076> to the LORD<3068> the males<2145>, the first<6363> offspring<6363> of every<3605> womb<7358>, but every<3605> firstborn<1060> of my sons<1121> I redeem<6299>.'