Curses, like chickens, come home to roost
This medieval version of our modern saying ‘what goes around comes around’ has its origins in fourteenth-century notions of morality. Chaucer gave expression to the idea at the end of the fourteenth century in ‘The Parson’s Tale’, with the line:
And ofte tyme swiche cursynge wrongfully retorneth agayn to hym that curseth, as a bryd that retorneth agayn to his owene nest.