וְהִנֵּ֣ה מִן־הַיְאֹ֗ר עֹלֹת֙ שֶׁ֣בַע פָּר֔וֹת בְּרִיא֥וֹת בָּשָׂ֖ר וִיפֹ֣ת תֹּ֑אַר וַתִּרְעֶ֖ינָה בָּאָֽחוּ׃
And, behold, there came up out of the river seven kine, fat-fleshed and well-favoured; and they fed in the reedgrass.
Read kabbalistic (mystical) interpretation of Genesis 41:18: and classical mystical sources.