Surah Al-Imran, ayah 139: "So do not weaken and do not grieve, and you will be superior if you are [true] believers." Read it in Arabic with transliteration and the Sahih International translation, with the ayah before and after it, and listen to it recited.
هَٰذَا بَيَانٌۭ لِّلنَّاسِ وَهُدًۭى وَمَوْعِظَةٌۭ لِّلْمُتَّقِينَ ﴿١٣٨﴾
Haazaa bayaanul linnaasi wa hudanw wa maw'izatul lilmuttaqeen
This [Qur'an] is a clear statement to [all] the people and a guidance and instruction for those conscious of Allah.
وَلَا تَهِنُوا۟ وَلَا تَحْزَنُوا۟ وَأَنتُمُ ٱلْأَعْلَوْنَ إِن كُنتُم مُّؤْمِنِينَ ﴿١٣٩﴾
Wa laa tahinoo wa laa tahzanoo wa antumul a'lawna in kuntum mu'mineen
So do not weaken and do not grieve, and you will be superior if you are [true] believers.
إِن يَمْسَسْكُمْ قَرْحٌۭ فَقَدْ مَسَّ ٱلْقَوْمَ قَرْحٌۭ مِّثْلُهُۥ ۚ وَتِلْكَ ٱلْأَيَّامُ نُدَاوِلُهَا بَيْنَ ٱلنَّاسِ وَلِيَعْلَمَ ٱللَّهُ ٱلَّذِينَ ءَامَنُوا۟ وَيَتَّخِذَ مِنكُمْ شُهَدَآءَ ۗ وَٱللَّهُ لَا يُحِبُّ ٱلظَّٰلِمِينَ ﴿١٤٠﴾
Iny-yamsaskum qarhum faqad massal qawma qarhum misluh; wa tilkal ayyaamu nudaawiluhaa bainan naasi wa liya'lamal laahul lazeena aamanoo wa yattakhiza minkum shuhadaaa'; wallaahu laa yuh ibbuz zaalimeen
If a wound should touch you - there has already touched the [opposing] people a wound similar to it. And these days [of varying conditions] We alternate among the people so that Allah may make evident those who believe and [may] take to Himself from among you martyrs - and Allah does not like the wrongdoers -
Arabic: Tanzil, Uthmani script. English: Sahih International. Audio: EveryAyah. Transliteration is a learning aid; read from the Arabic when you can.
Meaning and lessons
This ayah was revealed after the Battle of Uhud, when the believers had suffered losses. Allah tells them: do not lose heart and do not grieve, for you will be uppermost if you are believers. Ibn Kathir explains that it is a consolation and a promise: the final outcome belongs to the believers, and setbacks are a test.
The ayat that follow explain more: if a wound has touched you, a similar wound touched the other side, and these days are rotated among people so that Allah may know the true believers.
Summarised in our own words from Tafsir Ibn Kathir, on Quran 3:139. Translation of the ayah: Sahih International.
Ayah 139 of Surah Al-Imran (آلِ عِمۡرَانَ), "The Family of Imraan", surah 3 of the Quran, a Medinan surah of 200 ayat revealed in Madinah. It is in juz 4 (para 4), hizb 7, on page 67 of the standard Madinah mushaf. People search for it as 3/139, 3 139 or Quran 3 139.
More verses on this theme: Quran verses about hardship and ease, Quran verses about patience, Quran verses about motivation.
Questions
So do not weaken and do not grieve, and you will be superior if you are [true] believers. (Sahih International)
This ayah was revealed after the Battle of Uhud, when the believers had suffered losses. Allah tells them: do not lose heart and do not grieve, for you will be uppermost if you are believers. Ibn Kathir explains that it is a consolation and a promise: the final outcome belongs to the believers, and setbacks are a test.
It is in Surah Al-Imran, surah 3 of the Quran, in juz 4 (para 4), on page 67 of the Madinah mushaf.
The ayah before, 3:138, says: "This [Qur'an] is a clear statement to [all] the people and a guidance and instruction for those conscious of Allah." The ayah after, 3:140, says: "If a wound should touch you - there has already touched the [opposing] people a wound similar to it. And these days [of varying conditions] We alternate among the people so that Allah may make evident those who believe and [may] take to Himself from among you martyrs - and Allah does not like the wrongdoers -"