יָדַ֥ע שׁוֹר֙ קֹנֵ֔הוּ וַחֲמ֖וֹר אֵב֣וּס בְּעָלָ֑יו יִשְׂרָאֵל֙ לֹ֣א יָדַ֔ע עַמִּ֖י לֹ֥א הִתְבּוֹנָֽן׃
The ox knoweth his owner, And the ass his master’s crib; But Israel doth not know, My people doth not consider.
Read kabbalistic (mystical) interpretation of Isaiah 1:3: and classical mystical sources.