The Mahdī will be from the Prophetic lineage and will fill the earth with justice

The Prophet ﷺ said: "If only one day of this ˹worldly˺ time remained, Allah would raise up a man (the Mahdī) from my family who would fill this earth with justice as it has been filled with oppression."

عَنِ النَّبِيِّ ﷺ قَالَ لَوْ لَمْ يَبْقَ مِنَ الدَّهْرِ إِلاَّ يَوْمٌ لَبَعَثَ اللَّهُ رَجُلاً مِنْ أَهْلِ بَيْتِي يَمْلأُهَا عَدْلاً كَمَا مُلِئَتْ جَوْرًا

[AI] The Messenger of Allah ﷺ said, "If there was only one night remaining in this world, Allah would send a man from the family of the Prophet ﷺ to rule over it."

قَالَ رَسُولُ اللَّهِ ﷺ «لَوْ لَمْ يَبْقَ مِنَ الدُّنْيَا إِلَّا لَيْلَةٌ لَمَلَكَ فِيهَا رَجُلٌ مِنْ أَهْلِ بَيْتِ النَّبِيِّ ﷺ»

[AI] The Prophet Muhammad ﷺ said, "If there was only one night left in the world, a man from my family would rule it, and his name would be my name."

قَالَ رَسُولُ اللَّهِ ﷺ «لَوْ لَمْ يَبْقَ مِنَ الدُّنْيَا إِلَّا لَيْلَةٌ لَمَلَكَ فِيهَا رَجُلٌ مِنْ أَهْلِ بَيْتِي * اسْمُهُ اسْمِي»

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لَوْ لَمْ يَبْقَ مِنَ الدُّنْيَا إِلَّا يَوْمٌ لَبَعَثَ اللَّهُ رَجُلًا مِنْ أَهْلِ بَيْتِي يَمْلَؤُهَا عَدْلًا كَمَا مُلِئَتْ جَوْرًا وَهَذَا الْحَدِيثُ لَا نَعْلَمُهُ يُرْوَى عَنْ عَلِيٍّ بِهَذَا اللَّفْظِ بِإِسْنَادٍ أَحْسَنَ مِنْ هَذَا الْإِسْنَادِ

[AI] The Messenger of Allah ﷺ said, "If there was only one night left in the world, a man from the Prophet's household would rule it."

قَالَ رَسُولُ اللهِ ﷺ «لَوْ لَمْ يَبْقَ مِنَ الدُّنْيَا إِلَّا لَيْلَةٌ لَمَلَكَ فِيهَا رَجُلٌ مِنْ أَهْلِ بَيْتِ النَّبِيِّ ﷺ»

"لَوْ لَمْ يَبْقَ مِنَ الدُّنْيَا إلا لَيلَةٌ لَمَلَكَ فِيهَا رَجَلٌ مِنْ أَهْلِ بَيتِى".

"يَلِى رَجُلٌ مِنْ أَهْلِ بَيْتِى يُواطِئُ اسْمُهُ اسْمِى، لَوْ لَمْ يَبْقَ مِنَ الدُّنْيَا إِلَّا يَوْم لَطَوَّلَ اللَّه ذَلِكَ الْيَوْمَ حَتَّى يَلِى".