ציטירנדיקער פּירוש אויף איוב 7:19

שעו ממני Look away from me. Root שעה to let loose, to turn away; comp. תשעה Thou wilt depart²See chap. xvii. Note 11. (Job 7:19).

If he spit an ‘ayin-‘ayin verb (witness the doubling of the qof in “my spittle” [Job 7:19]). Even his spit is harmful, because the disease from which he suffers is contagious. Although people do not customarily spit in front of one another, it can nonetheless happen unintentionally: a man with a flow spits, and it falls on someone who was ritually pure.