What is the authenticity of Ka’b al-Ahbar’s narration regarding the sun and the moon, and that they are two castrated bulls that will be thrown into Hell on the Day of Resurrection? And what is the meaning of the phrase "examined for authenticity" found on the Al-Durar Al-Saniyyah website?

The phrase "its authenticity is being examined" indicates that the reader should not accept the hadith until its authenticity is confirmed, either due to the author's doubt or inability to verify it. "There is a scrutiny regarding its chain of transmission" is a phrase used by Imam Al-Tabari, meaning there is a pause concerning the verification of a specific chain of transmission. The aforementioned report attributed to Ibn Abbas is false because Al-Tabari's shaykh (teacher) is unknown, and one of its narrators is accused of fabricating hadith. As for the issue of the sun and moon being rolled up in the Fire on the Day of Judgment, Sahih Al-Bukhari explicitly states that they will be rolled up, and the addition "in the Fire" appeared in other narrations. The purpose of their presence in the Fire is not to punish them, but rather to reprimand those who worshipped them in this world, and to demonstrate the invalidity of their worship.