One of the meanings:

"Hear" WHO the two were that walked right by...who left him lying there NAKED, WITH NO CLOTHES:

A PRIEST
A LEVITE

Both are those who are supposed to guard the flock and temple. One of the biggest WARNINGS Jesus gives on WHO to watch out for.

Go look at the root word used for "well" in the Samaritan woman by the well passage. The same greek word is also used for the word "pit" in "bottomless pit".

So, could Jesus also be telling us that when the priests and levites fail, someone ELSE will come?

"God is my rock"
"....serpents hang on rocks..."