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Curses are like young chickens, theyalways come home to roost.

The Curse of Kehama motto (1810). Geoffrey Chaucer wrote something similar in "The Parson's Tale" (ca. 1387): "And ofte tyme swich cursynge wrongfully retorneth agayn to hym that curseth, as a bryd that retorneth agayn to his owene nest."
Curses are like young chickens, theyalways come home to roost.