This hadith from Jabir(ra) says that the holy Prophet(pbuh) has a secret confidential talk with Imam Ali(as) at the day of ta’if when the prople raised their objection, the holy Prophet (pbuh) this is from Allah(swt). We also know that imam Nisai mentioned a hadith from Umme Salma that at the last moment of the Holy Prophet(pbuh), he sent everybody out and only had secret and confidential talk with Imam in his last hour.
Sayyidina Jabir ibn Abdullah (RA) reported that Allah’s Messenger (SAW) called Sayyidina (RA) during the Battle of Ta’if and confided with him. The people said, “The confiding has lengthened with the son of his uncle.” Allah’s Messenger (SAW) said, “I have not had secret talk with him, but Allah has had secret talk with him.”
Imam Tirmidhi graded it as Hassan Hadith