וַיַּ֤עַן יוֹסֵף֙ וַיֹּ֔אמֶר זֶ֖ה פִּתְרֹנ֑וֹ שְׁלֹ֙שֶׁת֙ הַסַּלִּ֔ים שְׁלֹ֥שֶׁת יָמִ֖ים הֵֽם׃
And Joseph answered and said: ‘This is the interpretation thereof: the three baskets are three days;
Read kabbalistic (mystical) interpretation of Genesis 40:18: and classical mystical sources.