199 Heb “the head of your word is truth, and forever [is] all your just regulation.” The term “head” is used here of the “sum total” of God’s instructions.
200 Heb “and because of your instructions my heart trembles.” The psalmist’s healthy “fear” of the consequences of violating God’s instructions motivates him to obey them. See v. 120.

In other versions

The sum of your word is truth,

and every one of your righteous rules endures forever.

Princes persecute me without cause,

but my heart stands in awe of your words.

All your words are true;

all your righteous laws are eternal.

Rulers persecute me without cause,

but my heart trembles at your word.

The entirety of your word is truth,

each of your righteous judgments endures forever.

Princes have persecuted me without cause,

but my heart fears only your word.

The very essence of your words is truth;

all your just regulations will stand forever.

Powerful people harass me without cause,

but my heart trembles only at your word.

The whole of your word is truth,

and your every righteous judgment endures forever.

Princes persecute me without cause,

but my heart trembles because of your word.

Thy word is true from the beginning:

And every one of thy righteous judgments endureth for ever.

SCHIN.

Princes have persecuted me without a cause:

But my heart standeth in awe of thy word.

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