More than one of the scholars of Tafsir mentioned that one day the Messenger of Allah was addressing one of the great leaders of the Quraysh while hoping that he would accept Islam. While he was speaking in direct conversation with him, Ibn Umm Maktum came to him, and he was of those who had accepted Islam in its earliest days. He (Ibn Umm Maktum) then began asking the Messenger of Allah about something, urgently beseeching him. The Prophet hoped that the man would be guided, so he asked Ibn Umm Maktum to wait for a moment so he could complete his conversation. He frowned in the face of Ibn Umm Maktum and turned away from him in order to face the other man. Thus, Allah revealed,
{He frowned and turned away. Because there came to him the blind man. And how can you know that he might become pure?}

meaning, he may attain purification and cleanliness in his soul.
{Or he might receive admonition, and the admonition might profit him?}

meaning, he may receive admonition and abstain from the forbidden.
{As for him who thinks himself self-sufficient. To him you attend}

meaning, “you face the rich person so that perhaps he may be guided.’
{What does it matter to you if he will not become pure?}

meaning, “you are not responsible for him if he does not attain purification.’
{But as for him who came to you running. And is afraid.}

meaning, he is seeking you and he comes to you so that he may be guided by what you say to him.’
{Of him you are neglectful and divert your attention to another.}

meaning, ‘you are too busy.’ Here Allah commands His Messenger to not single anyone out with the warning. Rather, he should equal warn the noble and the weak, the poor and the rich, the master and the slave, the men and the women, the young and the old. Then Allah will guide whomever He chooses to a path that is straight. He has the profound wisdom and the decisive proof.
Abu Yala and Ibn Jarir both recorded from ‘A’ishah that she said about,
{He frowned and turned away} “This was revealed about Ibn Umm Maktum, the blind man. He came to the Messenger of Allah and began saying, ‘Guide me.’ At the time the Messenger of Allah had a man with him who was one of the great leaders of the idolators. So the Prophet turned away from him (Ibn Umm Maktum) and faced the other man and said...
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{exalted} meaning, elevated in status.
{purified} meaning, from impurity, additions and deficiency. Concerning Allah’s statement,
{In the hands of ambassadors (Safarah),}

Ibn ‘Abbas, Mujahid, Ad-Dahhak, and Ibn Zayd, all said, “These are the angels.”
Al-Bukhari said, “Safarah (ambassadors) refers to the angels. They travel around rectifying matters between themselves. The angels when they descend with the revelation of Allah, bringing it like the ambassador who rectifies matters between people.” Allah said,
{Honorable and obedient.} meaning, they are noble, handsome, and honorable in their creation. Their character and their deeds are righteous, pure and perfect. Here it should be noted that it is necessary for one who carries the Qur'an (i.e., the angel) to be following righteousness and guidance
Imam Ahmad recorded from ‘A’ishah that the Messenger of Allah said,
‘He who recites the Qur'an proficiently, will be with the noble, righteous, ambassador angels, and the one who recites it with difficulty will receive two rewards.”
This Hadith was reported by the group.