that Ar-Rubai' bint An-Nadr came to the Prophet ﷺ - and her son Harithah bin Suraqah had been killed on the Day of Badr, having been struck by an arrow, shot by an unknown person - so she came to the Messenger of Allah ﷺ and said: "Inform me about Harithah. If he has reached goodness, I shall be forbearing and patient. If he has not reached goodness, I will struggle supplicating for him." So Allah's Prophet ﷺ said: "O Umm Harithah! There are gardens in Paradise, and verily your son Harithah has reached the highest part of Paradise, and Al-Firdaws is the highest part of Paradise, its most center and best."
أَنَّ الرُّبَيِّعَ بِنْتَ النَّضْرِ أَتَتِ النَّبِيَّ ﷺ وَكَانَ ابْنُهَا حَارِثَةُ بْنُ سُرَاقَةَ أُصِيبَ يَوْمَ بَدْرٍ أَصَابَهُ سَهْمٌ غَرَبٌ فَأَتَتْ رَسُولَ اللَّهِ ﷺ فَقَالَتْ أَخْبِرْنِي عَنْ حَارِثَةَ لَئِنْ كَانَ أَصَابَ خَيْرًا احْتَسَبْتُ وَصَبَرْتُ وَإِنْ لَمْ يُصِبِ الْخَيْرَ اجْتَهَدْتُ فِي الدُّعَاءِ فَقَالَ النَّبِيُّ ﷺ يَا أُمَّ حَارِثَةَ إِنَّهَا جِنَانٌ فِي جَنَّةٍ وَإِنَّ ابْنَكِ أَصَابَ الْفِرْدَوْسَ الأَعْلَى وَالْفِرْدَوْسُ رَبْوَةُ الْجَنَّةِ وَأَوْسَطُهَا وَأَفْضَلُهَا قَالَ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ مِنْ حَدِيثِ أَنَسٍ