Among the believers are men true to what they promised Allah. Among (33:23)

﴿مِّنَ الْمُؤْمِنِينَ رِجَالٌ صَدَقُوا مَا عَاهَدُوا اللَّهَ عَلَيْهِ ۖ فَمِنْهُم مَّن قَضَىٰ نَحْبَهُ وَمِنْهُم مَّن يَنتَظِرُ ۖ وَمَا بَدَّلُوا تَبْدِيلًا﴾
[ الأحزاب: 23]

33:23 Among the believers are men true to what they promised Allah. Among them is he who has fulfilled his vow [to the death], and among them is he who awaits [his chance]. And they did not alter [the terms of their commitment] by any alteration -

Amongst the believers are men who were true to Allah, so they fulfilled what they promised Him, namely firmness and patience on striving in Allah’s way.
Amongst them are those who died or were killed in Allah’s way and amongst them are those who await martyrdom in His way.
And these believers did not change what they promised Allah like the hypocrites did with their promises.

Among the believers are men who have been true to their covenant with Allah [i.e. they have gone out for Jihad (holy fighting), and showed not their backs to the disbelievers], of them some have fulfilled their obligations (i.e. have been martyred), and some of them are still waiting, but they have never changed [i.e. they never proved treacherous to their covenant which they concluded with Allah] in the least.

phonetic Transliteration

Mina almumineena rijalun sadaqoo ma AAahadoo Allaha AAalayhi faminhum man qada nahbahu waminhum man yantathiru wama baddaloo tabdeelan

Abdullah Yusuf Ali - Translation

Among the Believers are men who have been true to their covenant with Allah: of them some have completed their vow (to the extreme), and some (still) wait: but they have never changed (their determination) in the least:

Safi-ur-Rahman al-Mubarakpuri

Among the believers are men who have been true to their covenant with Allah; of them some have fulfilled their Nahbah; and some of them are still waiting, but they have never changed in the least.

Page 421 English transliteration