The only sign may be found in verses 8 to 10 where they say...

The only sign may be found in verses 8 to 10 where they say: “But as to him who comes to you striving hard,” “And he fears (Allah in his heart).” “Of him wast thou unmindful.” This is the matter that can be true about the Prophet (S) more than anyone else. But, according to what 'Sayyed Murtaza' has said, there are some signs in the verses showing that 'the one' is not the Prophet (S).

Some of them are as follows: 'To be frowning' was not one of the Prophet’s character traits, especially for the Prophet of Islam. He spoke gently and with a kind face even to his own enemies and was even more kind to the truth‑seeking believers. Moreover, paying attention to the wealthy people and neglecting, the poor is not agreeable, at all, with what is said about him in Surah Qalam, No.

68, verse 4 which says: “And thou (standst) on an exalted standard of character", (with the particular note that Surah Qalam had been revealed before the revelation of Surah Abasa). But, supposing the first occasion of revelation is true, this act is not more than 'leaving to the better' /tark‑i‑'ula/ and there is nothing in it that contrasts with the state of sinlessness.

Since, first, the purpose of the Prophet (S) was definitely to absorb the Quraish leaders in order to spread Islam and to stop their sabotage. Secondly, it does not matter so much to frown at a blind man because he cannot see. Moreover, 'Abdullah‑ibn‑Ummi‑Maktum did not keep the rules of etiquette, since, he should not have interrupted the Prophet (S) when he was busy talking to the people who were gathered there.

On the one hand, since Allah’s emphasis is on love and affection for the poor and the afflicted, among the believers, it does not approve of the little amount of heedlessness from His prophet to that believing servant, so He admonishes him.

On the other hand, if we consider the Prophet (S) as a true, great prophet, from these verses we see that they are almost a miracle, because the great leader of Islam mentions such important responsibilities in the heavenly Holy Book, about himself, that he finds the slightest 'leaving to the better' an option: i.e. the little amount heedlessness to a blind truth‑seeking believer, which Allah admonish him for.

This is an evidence for the fact that this Book is from Allah and he is a true prophet, because if the Book were not from Allah, surely it would not have such content.