Genesis 41:3 Kabbalah

וְהִנֵּ֞ה שֶׁ֧בַע פָּר֣וֹת אֲחֵר֗וֹת עֹל֤וֹת אַחֲרֵיהֶן֙ מִן־הַיְאֹ֔ר רָע֥וֹת מַרְאֶ֖ה וְדַקּ֣וֹת בָּשָׂ֑ר וַֽתַּעֲמֹ֛דְנָה אֵ֥צֶל הַפָּר֖וֹת עַל־שְׂפַ֥ת הַיְאֹֽר׃

And, behold, seven other kine came up after them out of the river, ill favoured and lean-fleshed; and stood by the other kine upon the brink of the river.

Read kabbalistic (mystical) interpretation of Genesis 41:3: and classical mystical sources.