KJV:
And it shall come to pass, if ye shall hearken diligently unto my commandments which I command you this day, to love the LORD your God, and to serve him with all your heart and with all your soul,
NASB:
"It shall come about, if you listen obediently to my commandments which I am commanding you today, to love the LORD your God and to serve Him with all your heart and all your soul,
KJV:
That your days may be multiplied, and the days of your children, in the land which the LORD sware unto your fathers to give them, as the days of heaven upon the earth.
NASB:
so that your days and the days of your sons may be multiplied on the land which the LORD swore to your fathers to give them, as long as the heavens remain above the earth.
KJV:
Behold, I set before you this day a blessing and a curse;
NASB:
"See, I am setting before you today a blessing and a curse:
KJV:
A blessing, if ye obey the commandments of the LORD your God, which I command you this day:
NASB:
the blessing, if you listen to the commandments of the LORD your God, which I am commanding you today;
KJV:
And a curse, if ye will not obey the commandments of the LORD your God, but turn aside out of the way which I command you this day, to go after other gods, which ye have not known.
NASB:
and the curse, if you do not listen to the commandments of the LORD your God, but turn aside from the way which I am commanding you today, by following other gods which you have not known.
KJV:
And ye shall observe to do all the statutes and judgments which I set before you this day.
NASB:
and you shall be careful to do all the statutes and the judgments which I am setting before you today.