The ruling on the hadith of 'Ali from al-Tirmidhi and the weakness of its narrator

The questioner:
Honorable Shaykh, may Allah do you good, you mentioned some of the wording of the hadith of 'Ali from al-Tirmidhi. Is it authentic?

The Shaykh:
It is more likely that it is a mawquf (report stopping at a Companion) attributed to 'Ali. Some of them said its chain is weak, but Ibn Kathir (may Allah have mercy on him) said it is more likely to be a mawquf attributed to 'Ali, because it is more likely to be from the words of 'Ali. The "Sambata" from the hadiths and from the Qur'an will be trials. So, what is the way out of them, O Messenger of Allah? It is known that this is 'Ali's? He said: The Book of Allah, in it is news and forgiveness, and so on.

The presenter:
Okay, Shaykh.

The Shaykh:
And in it is true speech, true speech.

The questioner:
What about the hadith being multiplied by al-Harith al-A'war?

The Shaykh:
So he is a narrator, he is weak, but the meaning is correct. Allah is the Greatest.