Wyrd Sisters is Terry Pratchett’s sixth Discworld novel, published in 1988. It re-introduces Granny Weatherwax of Equal Rites.
Then let his master bringe him vnto the Goddes ad set him to the doore or the dorepost, ad bore his eare thorow with a naule, ad let him be his servaunte for euer. Exodus 21:6 TYN