What is the biography of 'Amr ibn al-Harith and what is his standing?

The student : My Shaykh, what is the biography of this 'Amr ibn al-Harith, as a point of benefit right now, I mean?

The Shaykh : He is Egyptian, like Ibn Lahi'ah, but he is trustworthy. However, this is just an example, so we do not need to dwell on it.
The student: Yes.

The Shaykh : But I would have liked to know what the issue is that you say sometimes causes us difficulty?
The student : No, my Shaykh, it is good. Now we have gained a benefit from among the matters we want. We give an example, my Shaykh: It occurs to me that when there is a weak narrator in the chain, like Ibn Lahi'ah.

The Shaykh: Yes.
The student : Like, for example, hadiths in Abu Dawud. The hadith comes with Ibn Lahi'ah in the chain, so when you trace the hadith, you say: "Abu Dawud narrated it through the route of Ibn Lahi'ah," and you did not speak of, or mention, Abu Dawud's shaykh and his shaykh's shaykh.

The Shaykh : Pardon me, in this crowd I was not paying attention to you.
The student : All right, my Shaykh.

The Shaykh : And there is no consideration for a narration except with proof and certainty. No, certainty is not used here.
The student : Yes.