The word(s) "buy" appears 3 time(s) in 3 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) These are the people who buy the life of this world at the price of the Hereafter: their penalty shall not be lightened nor shall they be helped.

(2) They followed what the evil ones gave out (falsely) against the power of Solomon: the blasphemers Were, not Solomon, but the evil ones, teaching men Magic, and such things as came down at babylon to the angels Harut and Marut. But neither of these taught anyone (Such things) without saying: "We are only for trial; so do not blaspheme." They learned from them the means to sow discord between man and wife. But they could not thus harm anyone except by Allah's permission. And they learned what harmed them, not what profited them. And they knew that the buyers of (magic) would have no share in the happiness of the Hereafter. And vile was the price for which they did sell their souls, if they but knew!

(3) They are the ones who buy Error in place of Guidance and Torment in place of Forgiveness. Ah! what boldness (They show) for the Fire!