A. Yusuf Ali:Translation:
But if good fortune comes to you from Allah, they
would be sure to say - as if there had never been Ties
of affection between you and them - "Oh! I wish I had
been with them; a fine thing should I then have made
of it!" 590

Muhammad Asad:Translation:
But if good fortune comes to you from God, such a person 88 is sure to say - just as if there had never been any question of love between you and him - : "Oh, would that I had been with them, and thus had a [share in their] mighty triumph !"
590 Just a selfish man's thought. Such men are far from being a source of strength to their community. They are no use in a fight, and the next verse by implication discards them.