3:139
وَلَا تَهِنُوا۟ وَلَا تَحْزَنُوا۟ وَأَنتُمُ ٱلْأَعْلَوْنَ إِن كُنتُم مُّؤْمِنِينَ
So do not weaken and do not grieve, and you will be superior if you are [true] believers.
The Family of Imran
وَلَا تَهِنُوا۟ وَلَا تَحْزَنُوا۟ وَأَنتُمُ ٱلْأَعْلَوْنَ إِن كُنتُم مُّؤْمِنِينَ
So do not weaken and do not grieve, and you will be superior if you are [true] believers.
Nearby ayahs help place verse 3:139 in sequence and meaning.
قَدْ خَلَتْ مِن قَبْلِكُمْ سُنَنٌ فَسِيرُوا۟ فِى ٱلْأَرْضِ فَٱنظُرُوا۟ كَيْفَ كَانَ عَـٰقِبَةُ ٱلْمُكَذِّبِينَ
Similar situations [as yours] have passed on before you, so proceed throughout the earth and observe how was the end of those who denied.
هَـٰذَا بَيَانٌ لِّلنَّاسِ وَهُدًى وَمَوْعِظَةٌ لِّلْمُتَّقِينَ
This [Qur'an] is a clear statement to [all] the people and a guidance and instruction for those conscious of Allah.
إِن يَمْسَسْكُمْ قَرْحٌ فَقَدْ مَسَّ ٱلْقَوْمَ قَرْحٌ مِّثْلُهُۥ ۚ وَتِلْكَ ٱلْأَيَّامُ نُدَاوِلُهَا بَيْنَ ٱلنَّاسِ وَلِيَعْلَمَ ٱللَّهُ ٱلَّذِينَ ءَامَنُوا۟ وَيَتَّخِذَ مِنكُمْ شُهَدَآءَ ۗ وَٱللَّهُ لَا يُحِبُّ ٱلظَّـٰلِمِينَ
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 -
وَلِيُمَحِّصَ ٱللَّهُ ٱلَّذِينَ ءَامَنُوا۟ وَيَمْحَقَ ٱلْكَـٰفِرِينَ
And that Allah may purify the believers [through trials] and destroy the disbelievers.