Reference for Job 2:8

וַיִּֽקַּֽח־ל֣וֹ חֶ֔רֶשׂ לְהִתְגָּרֵ֖ד בּ֑וֹ וְה֖וּא יֹשֵׁ֥ב בְּתוֹךְ־הָאֵֽפֶר׃

And he took him a potsherd to scrape himself therewith; and he sat among the ashes.