לֶ֣חֶם חֲמֻד֞וֹת לֹ֣א אָכַ֗לְתִּי וּבָשָׂ֥ר וָיַ֛יִן לֹא־בָ֥א אֶל־פִּ֖י וְס֣וֹךְ לֹא־סָ֑כְתִּי עַד־מְלֹ֕את שְׁלֹ֥שֶׁת שָׁבֻעִ֖ים יָמִֽים׃ (פ)
I ate no pleasant bread, neither came flesh nor wine in my mouth, neither did I anoint myself at all, till three whole weeks were fulfilled.
Read kabbalistic (mystical) interpretation of Daniel 10:3: and classical mystical sources.