'Myself' in the Bible

Tell it not in Gath, weep not at all: at Beth-le-aphrah have I rolled myself in the dust.

Wherewith shall I come before the LORD, and bow myself before the high God? shall I come before him with burnt offerings, with calves of a year old?

“Can I [be guiltless and] justify deceptive scalesAnd a bag of dishonest weights?