Alwarithin, Nabi Musa, His Brother Harun as heirs of Jannat became Heirs of Monarchy that belonged to fir-awn after.

ALWARITHIN, HEIRS OF JANNAT
ALWARITHIN HEIRS OF MORNACHY
Nabi Musa aleih salam ( peace be upon him) as heir of Jannat with his brother Nabi Harun aleih salam became a monarchy as heirs of earth for Jannat and they established justice after Allah Subhanahu Wataala (Most merciful the compassionate) destroyed firawn and his deputies Hamaan, and Qarun who belonged to Nabi Musa's nation but instead obeyed Fira-wn. This revealed in Quran Chapter 6:20-26 Surat Al-Maedat
ALWARITHIN HEIRS OF JANNAT
وَاِذْ قَالَ مُوْسٰى لِقَوْمِهٖ یٰقَوْمِ اذْكُرُوْا نِعْمَةَ اللّٰهِ عَلَیْكُمْ اِذْ جَعَلَ فِیْكُمْ اَنْۢبِیَآءَ وَ جَعَلَكُمْ مُّلُوْكًا ﳓ وَّ اٰتٰىكُمْ مَّا لَمْ یُؤْتِ اَحَدًا مِّنَ الْعٰلَمِیْنَ(20)
یٰقَوْمِ ادْخُلُوا الْاَرْضَ الْمُقَدَّسَةَ الَّتِیْ كَتَبَ اللّٰهُ لَكُمْ وَ لَا تَرْتَدُّوْا عَلٰۤى اَدْبَارِكُمْ فَتَنْقَلِبُوْا خٰسِرِیْنَ(21)
قَالُوْا یٰمُوْسٰۤى اِنَّ فِیْهَا قَوْمًا جَبَّارِیْنَ وَ اِنَّا لَنْ نَّدْخُلَهَا حَتّٰى یَخْرُجُوْا مِنْهَاۚ-فَاِنْ یَّخْرُجُوْا مِنْهَا فَاِنَّا دٰخِلُوْنَ(22)
قَالَ رَجُلٰنِ مِنَ الَّذِیْنَ یَخَافُوْنَ اَنْعَمَ اللّٰهُ عَلَیْهِمَا ادْخُلُوْا عَلَیْهِمُ الْبَابَۚ-فَاِذَا دَخَلْتُمُوْهُ فَاِنَّكُمْ غٰلِبُوْنَ وَ عَلَى اللّٰهِ فَتَوَكَّلُوْۤا اِنْ كُنْتُمْ مُّؤْمِنِیْنَ(23)
قَالُوْا یٰمُوْسٰۤى اِنَّا لَنْ نَّدْخُلَهَاۤ اَبَدًا مَّا دَامُوْا فِیْهَا فَاذْهَبْ اَنْتَ وَ رَبُّكَ فَقَاتِلَاۤ اِنَّا هٰهُنَا قٰعِدُوْنَ(24)
قَالَ رَبِّ اِنِّیْ لَاۤ اَمْلِكُ اِلَّا نَفْسِیْ وَ اَخِیْ فَافْرُقْ بَیْنَنَا وَ بَیْنَ الْقَوْمِ الْفٰسِقِیْنَ(25)
قَالَ فَاِنَّهَا مُحَرَّمَةٌ عَلَیْهِمْ اَرْبَعِیْنَ سَنَةًۚ-یَتِیْهُوْنَ فِی الْاَرْضِؕ-فَلَا تَاْسَ عَلَى الْقَوْمِ الْفٰسِقِیْنَ(26)
ALWARITHIN HEIRS OF JANNAT
(20).Remember when Mūsā said to his nation: “O my nation! Remember the favour of Allah upon you when He made prophets among you, and He made you kings, and He endowed you with that which He did not give to anyone in the world.
(21).O my nation! Enter the sacred land (Jerusalem of today) which Allah has decreed for you, and do not retreat upon your heels lest you return as losers.”
(22).They (His nation) said: “O Mūsā! In this ˹land˺ there is a mighty nation, and we will never enter it until they leave it. So, if they leave it, then we shall enter.”
(23). Two men from those who fear Allah and upon whom Allah bestowed favour said: “Enter upon them through the gate ˹of the city˺. So when you enter it, you shall be dominant. And place your trust in Allah if you are people of faith.”
(24).They said: “O Mūsā! Surely we will never enter it as long as they are there. Therefore, go forth you and your Lord and fight; we are sitting here.”
(25).He (Mūsā) said: “O my Lord! I only have authority over my life and my brother. So, separate us from the disobedient nation.”
(26).He (Allah) said: “So it (the land) is forbidden for them for 40 years. They will wander bewildered in the earth. So, do not sorrow over the disobedient nation.”