Job 33:21 Kabbalah

יִ֣כֶל בְּשָׂר֣וֹ מֵרֹ֑אִי ושפי [וְשֻׁפּ֥וּ] עַ֝צְמוֹתָ֗יו לֹ֣א רֻאּֽוּ׃

His flesh is consumed away, that it cannot be seen; And his bones corrode to unsightliness.

Read kabbalistic (mystical) interpretation of Job 33:21: and classical mystical sources.