וצפן [יִצְפֹּ֣ן] לַ֭יְשָׁרִים תּוּשִׁיָּ֑ה מָ֝גֵ֗ן לְהֹ֣לְכֵי תֹֽם׃
ער באַהאַלט פֿאַר די רעכטפֿאַרטיקע הילף, אַ שילד פֿאַר די װאָס גײען מיט ערלעכקײט,
Rashi
He lays up sound wisdom for the upright The Holy One, blessed be He, hid it [wisdom] with Him for twenty-six generations until He gave it to the generation of the desert.
Rashi
a shield for those who walk in integrity (He lays up a shield for those who walk with integrity); i.e., it will be a shield for you.