Praise be to Allah.
This hadith is false and fabricated. This report was narrated by ad-Daylami in Musnad al-Firdaws, and a similar report was narrated in Kanz al-‘Ummaal (9/465), via Muqaatil ibn Sulaymaan: Fadl ibn ‘Ubayd told us, from Sufyaan ath-Thawri, from ‘Ubaydullah al-‘Umari, from Naafi‘, from Ibn ‘Umar, and attributed to the Prophet (blessings and peace of Allah be upon him): “Whoever recites Aayat al-Kursiy after doing wudoo’, Allah will give him the reward of forty scholars, and raise him forty degrees in status, and give him in marriage forty of al-hoor al-‘iyn.” This is a fabricated isnaad. Muqaatil ibn Sulaymaan was a well-known liar. An-Nasaa’i said: The liars who were well known for fabricating hadith were: Ibn Abi Yahya in Madinah, al-Waaqidi in Baghdad, Muqaatil ibn Sulaymaan in Khurasaan, and Muhammad ibn Sa‘eed in Syria.
End quote from Mizaan al-I‘tidaal (3.562)
See: al-Fawaa’id al-Majmoo‘ah (p. 312); Tadhkirat al-Mawdoo‘aat (p. 79)
It was also narrated by Ibn Baabawayh in al-Majlis al-Haadi wa’l-‘Ishreen min Amaalihi (p. 7). He said:
Al-Husayn ibn Ahmad ibn Idrees told us: My father told me, from Muhammad ibn al-Husayn ibn Abi’l-Khattaab, from Muhammad ibn Abi ‘Umayr, from Ja‘far al-Azdi, from ‘Amr ibn Abi’l-Miqdaam: I heard Abu Ja‘far al-Baaqir (peace be upon him) say: “Whoever recites Aayat al-Kursiy once, Allah will divert from him one thousand harms of this world and one thousand harms of the hereafter; the easiest of harms in this world is poverty and the easiest of harms in the hereafter is the torment of the grave.”
In addition to the fact that it is not stated clearly here that these are the words of the Prophet (blessings and peace of Allah be upon him) or of any of his companions – rather the isnaad ends with Abu Ja‘far al-Baaqir (who died sometime after 110 AH) – the isnaad t him is also worthless, as ‘Amr ibn Abi’l-Miqdaam is a worthless Raafidi. Ibn al-Ma‘een said: He is nothing. And on one occasion he said: He is not trustworthy or reliable. An-Nasaa’i said: His hadith is to be rejected. Ibn Hibbaan said: He narrates fabricated reports.
See: Mizaan al-I‘tidaal (3/249)
In addition to its isnaad being flimsy, it is also munkar (odd) in terms of its text, especially the version that was quoted by the questioner, because it contains this obvious exaggeration, and because it says in it: “and for each letter of its verses He will create for him an angel who will pray for forgiveness for him until the Day of Resurrection.”
These words are false, because the apparent meaning suggests that the Qur’an is created, but the Qur’an is the word of Allah and is not created, as is the belief of Ahl as-Sunnah wa’l-Jamaa‘ah.
The hadiths which speak of the virtues of Aayat al-Kursiy, and what is to be said following wudoo’, are very well known; they are sufficient and the Muslim has no need of these false reports.
What should be relied on in this regard is the well-known books of dhikr, such as al-Adkhaar by an-Nawawi, Saheeh al-Kalim at-Tayyib by al-Albaani, and Husn al-Muslim by al-Qahtaani [available in English as Fortress of the Muslim].
No attention should be paid to that which people pass around in chat rooms and on websites, not paying attention to verification of reports.
Please see the answer to question no. 34725
And Allah knows best.