3:139

وَلَا تَهِنُوا وَلَا تَحْزَنُوا وَأَنتُمُ الْأَعْلَوْنَ إِن كُنتُم مُّؤْمِنِينَ

Transliteration:

Wala tahinoo wala tahzanoo waantumu al-aAAlawna in kuntum mu/mineena

Word by Word:

And (do) not weaken and (do) not grieve and you (will be) [the] superior, if you are believers.

Translations:

Be not, then, faint of heart, and grieve not: for you are bound to rise high if you are [truly] believers.

So lose not heart, nor fall into despair: For ye must gain mastery if ye are true in Faith.

Faint not nor grieve, for ye will overcome them if ye are (indeed) believers.

And be not weak-hearted, nor grieve, and you will have the upper hand if you are believers.

So do not weaken and do not grieve, and you will be superior if you are [true] believers.