Deut.15.5

Only if thou carefully hearken unto the voice of the LORD thy God, to observe to do all these commandments which I command thee this day.

Deut.15.5

But only if you listen obediently to the Voice of GOD, your God, diligently observing every commandment that I command you today.

Deut.15.5

if only you fully obey the LORD your God and are careful to follow all these commands I am giving you today.

Deut.15.5

only if you carefully obey the voice of the LORD your God, to observe with care all these commandments which I command you today.