3:153 idh tuS'Iduuna wa laa talwuuna 'Alaa aHadiw war rasuulu yad'UUkum fiy ukhraakum fa athaabakum gam-mam bi gam-mil li kaylaa taHzanuu 'Alaa maa faatakum wa laa maa aSaabakum* wal-laahu khabiyrum bimaa ta'Åmaluun

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Ahmed Raza Khan: Mohammed Aqib Qadri:
When you were leaving, unconcerned without turning to look back at anyone, and from another group Our Noble Messenger was calling you (to fight); so He gave you sorrow in lieu of sorrow, and then forgave you so that you do not grieve over what has been lost or over the calamity that befell you; and Allah is Well Aware of what you do.

Yusuf Ali:
Behold! ye were climbing up the high ground, without even casting a side glance at any one, and the Messenger in your rear was calling you back. There did Allah give you one distress after another by way of requital, to teach you not to grieve for (the booty) that had escaped you and for (the ill) that had befallen you. For Allah is well aware of all that ye do.

Pickthal:
When ye climbed (the hill) and paid no heed to anyone, while the messenger, in your rear, was calling you (to fight). Therefor He rewarded you grief for (his) grief, that (He might teach) you not to sorrow either for that which ye missed or for that which befell you. Allah is Informed of what ye do.