שֶׁ֧בַע פָּרֹ֣ת הַטֹּבֹ֗ת שֶׁ֤בַע שָׁנִים֙ הֵ֔נָּה וְשֶׁ֤בַע הַֽשִּׁבֳּלִים֙ הַטֹּבֹ֔ת שֶׁ֥בַע שָׁנִ֖ים הֵ֑נָּה חֲל֖וֹם אֶחָ֥ד הֽוּא׃
The seven good kine are seven years; and the seven good ears are seven years: the dream is one.
Read kabbalistic (mystical) interpretation of Genesis 41:26: and classical mystical sources.