18:21 wa kadhaalika a'Åtharnaa 'Alayhim li ya'Ålamuu an-na wa'Ådal-laahi Haq-quw wa an-nas saa'Ata laa rayba fiyhaa* idh yatanaaza'UUna baynahum amrahum fa qaalubnuu 'Alayhim bunyaanaa* rab-buhum a'Ålamu bihim* qaalal-ladhiyna galabuu 'Alaa amrihim la nat-takhidhan-na 'Alayhim masjidaa

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Ahmed Raza Khan: Mohammed Aqib Qadri:
And this is how We made them known for people to know that the promise of Allah is true and that there is no doubt concerning the Last Day; when the people began disputing among themselves regarding them, they said, "Construct a building over their cave"; their Lord well knows them; those who dominated in this matter said, "We promise we will build a mosque over them."

Yusuf Ali:
Thus did We make their case known to the people, that they might know that the promise of Allah is true, and that there can be no doubt about the Hour of Judgment. Behold, they dispute among themselves as to their affair. (Some) said, "Construct a building over them": Their Lord knows best about them: those who prevailed over their affair said, "Let us surely build a place of worship over them."

Pickthal:
And in like manner We disclosed them (to the people of the city) that they might know that the promise of Allah is true, and that, as for the Hour, there is no doubt concerning it. When (the people of the city) disputed of their case among themselves, they said: Build over them a building; their Lord knoweth best concerning them. Those who won their point said: We verily shall build a place of worship over them.