וַאֲנִי־בַ֭עַר וְלֹ֣א אֵדָ֑ע בְּ֝הֵמ֗וֹת הָיִ֥יתִי עִמָּֽךְ׃
Но я был жестоким и невежественным; Я был как зверь перед Тобой.
Rashi
But I was brutish, and I did not know what this manner was, and I was as a beast with You.
Radak
then I was foolishBefore I understood, I was ignorant, and that person is one without knowledge, just as the Creator formed the beast....
Radak
I was like a beast before Thee. I served you, for I did not know if there is a reward or not.