What is the authenticity of what has been reported regarding the virtue of seeking forgiveness and adhering to it?

Question:
Is the first hadith authentic, the hadith of Ibn Abbas (whoever adheres to seeking forgiveness...)?

Answer:
I do not recall any objection to it. The one who compiled it said: Whoever adheres to seeking forgiveness?
The student: Yes. It was narrated by Abu Dawud, Imam Ahmad in the Musnad, Ibn Majah, and al-Hakim. In its chain is al-Hakim ibn Misa'ab. Abu Hatim said: Unknown. Ibn Hibban mentioned him among the weak narrators, and al-Azdi said: He is not corroborated in his hadith.
The Shaykh: It needs corroboration. And what did he say about the second one?
The student: He says: It was narrated by Abu Dawud and al-Tirmidhi. In its chain is a narrator whom no one authenticated except Ibn Hibban. Al-Hakim narrated it through another route and graded it authentic, and al-Dhahabi agreed with him. It is as they said.
The Shaykh: In any case, even if it were not authentic, repentance to Allah and seeking forgiveness erase sins by the explicit text of the Qur'an. The important thing is sincerity in repentance and seeking forgiveness. The verse of the Qur'an is sufficient and explicit in this matter. The important thing is sincerity. We ask Allah for success for everyone in being sincere.