NET
7 The law of the Lord is perfect and preserves one’s life. The rules set down by the Lord are reliable and impart wisdom to the inexperienced.
Darby
7 The law of Jehovah is perfect, restoring the soul; the testimony of Jehovah is sure, making wise the simple;
KJV
7 The law of the LORD [is] perfect, converting the soul: the testimony of the LORD [is] sure, making wise the simple.