ואנתה [וְאַ֤נְתְּ] בְּרֵהּ֙ בֵּלְשַׁאצַּ֔ר לָ֥א הַשְׁפֵּ֖לְתְּ לִבְבָ֑ךְ כָּל־קֳבֵ֕ל דִּ֥י כָל־דְּנָ֖ה יְדַֽעְתָּ׃
At ikaw na kanyang anak, O Belsasar, ay hindi mo pinakumbaba ang iyong puso, bagaman nalalaman mo ang lahat ng ito.
Rashi
in view of the fact that you know all this in view of the fact that you know all this that befell your father, and you should have feared the Holy One, blessed be He.