13. The angels that carry the Throne of Allahuthala and those around it, not only believe and praise their Lord but also ask forgiveness and protection for the believers. What is that supplication?

السلام عليكم ورحمة الله وبركاتة       

ﺑِﺴْـــــــﻢِﷲِﺍﻟﺮَّﺣْﻤَﻦِﺍلرَّﺣِﻴﻢ

Answer:

رَبَّنَا وَسِعْتَ كُلَّ شَىْءٍۢ رَّحْمَةًۭ وَعِلْمًۭا فَٱغْفِرْ لِلَّذِينَ تَابُوا۟ وَٱتَّبَعُوا۟ سَبِيلَكَ وَقِهِمْ عَذَابَ ٱلْجَحِيمِ 

 "Our Lord, You have encompassed all things in mercy and knowledge, so forgive those who have repented and followed Your way and protect them from the punishment of Hellfire. [40:7]

رَبَّنَا وَأَدْخِلْهُمْ جَنَّـٰتِ عَدْنٍ ٱلَّتِى وَعَدتَّهُمْ وَمَن صَلَحَ مِنْ ءَابَآئِهِمْ وَأَزْوَٰجِهِمْ وَذُرِّيَّـٰتِهِمْ ۚ إِنَّكَ أَنتَ ٱلْعَزِيزُ ٱلْحَكِيمُ ○

Our Lord, and admit them to gardens of perpetual residence which You have promised them and whoever was righteous among their forefathers, their spouses and their offspring. Indeed, it is You who is the Exalted in Might, the Wise.[40:8]

وَقِهِمُ ٱلسَّيِّـَٔاتِ ۚ وَمَن تَقِ ٱلسَّيِّـَٔاتِ يَوْمَئِذٍۢ فَقَدْ رَحِمْتَهُۥ ۚ وَذَٰلِكَ هُوَ ٱلْفَوْزُ ٱلْعَظِيمُ 

And protect them from the evil consequences [of their deeds]. And he whom You protect from evil consequences that Day - You will have given him mercy. And that is the great attainment." [40:9] 

Explanation:

Normally the Allah's Arsh (Throne) is carried by four angels and, on the Day of Qiyamah they will be eight angels carrying His throne.    Allahuthala only knows the number of angels around the arsh. They may be rows of several hundred thousands of  angels called (کرّوبِی) karrubi. 

We do not  know whether they are appointed for praying for the good of the believers or it is their nature to pray for well being of human beings.

There is a great disparity between angels and human beings in species, station, total submission, obedience, commitment, worship and rank. In spite of these disparities angels develop a strong relationship of cherishing a common creed and faith.

As angels are intermediaries between Allah Subhanahuthala and human beings, they pray for all believers, especially who

1. Have strong Iman.

2. Do lots of good deeds.

3. Follow sunnah

4. The effort they put on their family members. (Giving right guidance, supplicating for them, giving charity for them etc.)

The angels are so earnest in their desire of well-being for the believers. They go on repeating their good wishes for them even after knowing that Allah will certainly bless them with these favors in the Hereafter.

Angels ask for forgiveness to Allah for those human beings who sincerely repented  for their errors, sins, weaknesses and trangressions. They ask Allah with His infinite Mercy, to forgive them.They also pray for  their protection from Hell and be saved from every evil of their own deeds and the evil consequences of the Last Day. They also ask Allah for granting the believers the  Paradise which He Himself has promised them.

Said Ibn Jubayr has said, 'When a believer goes to Jannah, he will ask about his father, son, brother and others, and would want to know where they are. He will be told that their deeds were not like yours (therefore, they will not be there). He will say, 'whatever good I did (was not for me alone), in fact, it was for me and them both.' Then, the command will come, 'admit them too into the Jannah.' (Ibn Kathir)

When a person join with their families in the Hereafter their happiness becomes total and complete. Allah says: "We will join their children with them" (52:21). That is the great triumph.7⁹

When a believer is strong in faith, dutiful to his family and do good, angels will pray for his success along with his family in the Hereafter.

الحمدلله