47:20 wa yaquulul-ladhiyna aamanuu lawlaa nuz-zilat suurah* fa idhaa unzilat suuratum muHkamatuw wa dhukira fiyhal qitaalu ra-aytal-ladhiyna fiy quluubihim maraDuy yanZuruuna ilayka naZaral magshiy-yi ‘Alayhi minal mawti fa awlaa lahum

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Ahmed Raza Khan: Mohammed Aqib Qadri:
And the Muslims say, “Why was not a chapter sent down?” So when a positive chapter was sent down, and war was commanded in it, you will see those in whose hearts is a disease looking at you with the dazed looks of a dying man; so it would be better for them. -

Yusuf Ali:
Those who believe say, "Why is not a sura sent down (for us)?" But when a sura of basic or categorical meaning is revealed, and fighting is mentioned therein, thou wilt see those in whose hearts is a disease looking at thee with a look of one in swoon at the approach of death. But more fitting for them-

Pickthal:
And those who believe say: If only a surah were revealed! But when a decisive surah is revealed and war is mentioned therein, thou seest those in whose hearts is a disease looking at thee with the look of men fainting unto death. Therefor woe unto them!