רֹאשׁ־דְּבָרְךָ֥ אֱמֶ֑ת וּ֝לְעוֹלָ֗ם כָּל־מִשְׁפַּ֥ט צִדְקֶֽךָ׃
The beginning of Thy word is truth; And all Thy righteous ordinance endureth for ever.
Orchot Tzadikim
As for him who speaks the truth, there is no quality like it. Therefore, "The beginning of thy word is truth" (Ps. 119:160). And it is said, "Keep thee far from a false matter" (Ex. 23:7).