3:139
وَلَا تَهِنُوا وَلَا تَحْزَنُوا وَاَنْتُمُ الْاَعْلَوْنَ اِنْ كُنْتُمْ مُؤْمِنٖینَ
Wala tahinoo wala tahzanoo waantumu alaAAlawna in kuntum mumineena
Translations
So do not weaken and do not grieve, and you will be superior if you are [true] believers
Saheeh International
Faint not nor grieve, for ye will overcome them if ye are (indeed) believers
Marmaduke Pickthall