Hiri Sutta  (SN 1:18)

This pair of verses provides an answer to the question posed and left unanswered in Dhp 143.

“Who in the world

is a man constrained by shame,

who awakens to censure

like a fine stallion     to the whip?”

“Those restrained by shame

are rare—

those who go through life

always mindful.

Having reached the end

of suffering & stress,

they go among the discordant