'Buying' in the Bible

and Joseph gathereth all the silver that is found in the land of Egypt, and in the land of Canaan, for the corn that they are buying, and Joseph bringeth the silver into the house of Pharaoh.

And Boaz saith, 'In the day of thy buying the field from the hand of Naomi, then from Ruth the Moabitess, wife of the dead, thou hast bought it, to raise up the name of the dead over his inheritance.'