The Quran root خ ل د kh-l-d

وَبَشِّرِ الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ أَنَّ لَهُمْ جَنَّاتٍ تَجْرِي مِن تَحْتِهَا الْأَنْهَارُ كُلَّمَا رُزِقُوا مِنْهَا مِن ثَمَرَةٍ رِّزْقًا قَالُوا هَٰذَا الَّذِي رُزِقْنَا مِن قَبْلُ وَأُتُوا بِهِ مُتَشَابِهًا وَلَهُمْ فِيهَا أَزْوَاجٌ مُّطَهَّرَةٌ وَهُمْ فِيهَا خَالِدُونَ ٢٥

خَالِدُونَ khālidūna · (will) abide forever

And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. (Surah Al-Baqarah, 2:25)

وَالَّذِينَ كَفَرُوا وَكَذَّبُوا بِآيَاتِنَا أُولَٰئِكَ أَصْحَابُ النَّارِ هُمْ فِيهَا خَالِدُونَ ٣٩

خَالِدُونَ khālidūna · (will) abide forever

And those who disbelieve and deny Our signs - those will be companions of the Fire; they will abide therein eternally." (Surah Al-Baqarah, 2:39)

ثُمَّ قِيلَ لِلَّذِينَ ظَلَمُوا ذُوقُوا عَذَابَ الْخُلْدِ هَلْ تُجْزَوْنَ إِلَّا بِمَا كُنتُمْ تَكْسِبُونَ ٥٢

الْخُلْدِ l-khul'di · the everlasting

Then it will be said to those who had wronged, "Taste the punishment of eternity; are you being recompensed except for what you used to earn?" (Surah Yunus, 10:52)

وَلَوْ شِئْنَا لَرَفَعْنَاهُ بِهَا وَلَٰكِنَّهُ أَخْلَدَ إِلَى الْأَرْضِ وَاتَّبَعَ هَوَاهُ فَمَثَلُهُ كَمَثَلِ الْكَلْبِ إِن تَحْمِلْ عَلَيْهِ يَلْهَثْ أَوْ تَتْرُكْهُ يَلْهَث ذَّٰلِكَ مَثَلُ الْقَوْمِ الَّذِينَ كَذَّبُوا بِآيَاتِنَا فَاقْصُصِ الْقَصَصَ لَعَلَّهُمْ يَتَفَكَّرُونَ ١٧٦

أَخْلَدَ akhlada · adhered

And if We had willed, We could have elevated him thereby, but he adhered [instead] to the earth and followed his own desire. So his example is like that of the dog: if you chase him, he pants, or if you leave him, he [still] pants. That is the example of the people who denied Our signs. So relate the stories that perhaps they will give thought. (Surah Al-A'raf, 7:176)

يُضَاعَفْ لَهُ الْعَذَابُ يَوْمَ الْقِيَامَةِ وَيَخْلُدْ فِيهِ مُهَانًا ٦٩

وَيَخْلُدْ wayakhlud · and he will abide forever

Multiplied for him is the punishment on the Day of Resurrection, and he will abide therein humiliated - (Surah Al-Furqan, 25:69)

يَطُوفُ عَلَيْهِمْ وِلْدَانٌ مُّخَلَّدُونَ ١٧

مُّخَلَّدُونَ mukhalladūna · immortal

There will circulate among them young boys made eternal. (Surah Al-Waqi'ah, 56:17)