מַֽיִם־גְּנוּבִ֥ים יִמְתָּ֑קוּ וְלֶ֖חֶם סְתָרִ֣ים יִנְעָֽם׃
도적질한 물이 달고 몰래 먹는 떡이 맛이 있다 하는도다
Rashi
Stolen water is sweet The pleasure afforded by intimacy with a single woman does not equal that afforded by intimacy with a married woman. Also, regarding the commandments (other editions: sectarianism), stolen water is sweet, for they were afraid to do it in public, but did it in secret.