Vilkat goð geyja
grey þykkjumk Freyja
"I will not blaspheme the gods,
but I think Freyja is a bitch"
"This Text holdeth their noses so hard to the grindstone, that it clean disfigureth their Faces." [Frith, "Mirror to know Thyself," 1532]The main modern (reflective) sense of "work hard" is from 1828.