The word(s) "ransom" appears 13 time(s) in 13 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) Even if the wrong-doers had all that there is on earth, and as much more, (in vain) would they offer it for ransom from the pain of the Penalty on the Day of Judgment: but something will confront them from Allah, which they could never have counted upon!

(12) Therefore, when ye meet the Unbelievers (in fight), smite at their necks; At length, when ye have thoroughly subdued them, bind a bond firmly (on them): thereafter (is the time for) either generosity or ransom: Until the war lays down its burdens. Thus (are ye commanded): but if it had been Allah's Will, He could certainly have exacted retribution from them (Himself); but (He lets you fight) in order to test you, some with others. But those who are slain in the Way of Allah,- He will never let their deeds be lost.

(13) "This Day shall no ransom be accepted of you, nor of those who rejected Allah." Your abode is the Fire: that is the proper place to claim you: and an evil refuge it is!"