שַׂ֣ק תָּ֭פַרְתִּי עֲלֵ֣י גִלְדִּ֑י וְעֹלַ֖לְתִּי בֶעָפָ֣ר קַרְנִֽי׃
I have sewed sackcloth upon my skin, And have laid my horn in the dust.
Rashi on Job
my scab Heb. גלדי, a dry wound that forms a crust, and [in] the language of the Mishnah (Rosh Hashanah 27b): He scraped it (the shofar) down to a thin crust (גלדו).
Malbim on Job
Job's outcry was no more than should be expected from someone who has endured such an ordeal.
Rashi on Job
and sullied Heb. ועללתי, and I sullied, like (Jud. 19:25), “and abused (ויתעללו) her,” an expression of disgrace and abasement, and like (Lam. 3:51), “sullies (עוללה) my soul.”