וַיֹּ֣אמֶר אֵלַ֔י עַ֚ד עֶ֣רֶב בֹּ֔קֶר אַלְפַּ֖יִם וּשְׁלֹ֣שׁ מֵא֑וֹת וְנִצְדַּ֖ק קֹֽדֶשׁ׃
And he said unto me: ‘Unto two thousand and three hundred evenings and mornings; then shall the sanctuary be victorious.’
Read kabbalistic (mystical) interpretation of Daniel 8:14: and classical mystical sources.