O you who have believed, do not make allies of a people (60:13)

﴿يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَتَوَلَّوْا قَوْمًا غَضِبَ اللَّهُ عَلَيْهِمْ قَدْ يَئِسُوا مِنَ الْآخِرَةِ كَمَا يَئِسَ الْكُفَّارُ مِنْ أَصْحَابِ الْقُبُورِ﴾
[ الممتحنة: 13]

60:13 O you who have believed, do not make allies of a people with whom Allah has become angry. They have despaired of [reward in] the Hereafter just as the disbelievers have despaired of [meeting] the inhabitants of the graves.

Since the Sūrah commenced with a warning against becoming allies with Allah’s enemies, it ends with a warning against the same to reiterate what was said previously.
Allah said: O you who have faith in Allah, and who act on what He has ordained for you, do not take as allies a people with whom Allah is angry.
They do not have conviction in the afterlife.
Instead they despair of it just like their despair of the return of their dead to them, because they reject resurrection.

O you who believe! Take not as friends the people who incurred the Wrath of Allah (i.e. the Jews). Surely, they have been in despair to receive any good in the Hereafter, just as the disbelievers have been in despair about those (buried) in graves (that they will not be resurrected on the Day of Resurrection).

phonetic Transliteration

Ya ayyuha allatheena amanoo la tatawallaw qawman ghadiba Allahu AAalayhim qad yaisoo mina alakhirati kama yaisa alkuffaru min ashabi alquboori

Abdullah Yusuf Ali - Translation

O ye who believe! Turn not (for friendship) to people on whom is the Wrath of Allah, of the Hereafter they are already in despair, just as the Unbelievers are in despair about those (buried) in graves.

Safi-ur-Rahman al-Mubarakpuri

O you who believe! Take not as friends the people who incurred the wrath of Allah. Surely, they have despaired of the Hereafter, just as the disbelievers have despaired of those (buried) in graves.

Page 551 English transliteration