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The following was revealed when they ransomed those taken captive at Badr: It is not for any Prophet to have (read as an takūna lahu or an yakūna lahu) prisoners until he has made slaughter in the land, going all the way in fighting disbelievers. You, O believers, desire the transient things of this world, its ephemeral gains, by ransoming, while Allahu ta’ālā desires, for you, the Hereafter, that is, its reward, through your killing them; and Allahu ta’ālā is Mighty, Wise: this was abrogated by His words [and set them free] afterward either with grace or by ransom [Q. 47:4].