וַיִּשְׁחֲט֣וּ הַפֶּ֔סַח בְּאַרְבָּעָ֥ה עָשָׂ֖ר לַחֹ֣דֶשׁ הַשֵּׁנִ֑י וְהַכֹּהֲנִ֨ים וְהַלְוִיִּ֤ם נִכְלְמוּ֙ וַיִּֽתְקַדְּשׁ֔וּ וַיָּבִ֥יאוּ עֹל֖וֹת בֵּ֥ית יְהוָֽה׃
Then they killed the passover lamb on the fourteenth day of the second month; and the priests and the Levites were ashamed, and sanctified themselves, and brought burnt-offerings into the house of the LORD.
Read Kabbalistic (mystical) interpretations of II Chronicles 30:15: Zohar and classical Jewish mystical sources, free online.