כָּל־הַמִּשְׁכָּ֗ב אֲשֶׁ֨ר יִשְׁכַּ֥ב עָלָ֛יו הַזָּ֖ב יִטְמָ֑א וְכָֽל־הַכְּלִ֛י אֲשֶׁר־יֵשֵׁ֥ב עָלָ֖יו יִטְמָֽא׃
Every bed whereon he that hath the issue lieth shall be unclean; and every thing whereon he sitteth shall be unclean. .
Read kabbalistic (mystical) interpretation of Leviticus 15:4: and classical mystical sources.