Allah Taala said in His Book in surah al-Baqarah:

(91) When it is said to them, “Believe in what Allah Hath sent down, “they say, “We believe in what was sent down to us:” yet they reject all besides, even if it be Truth confirming what is with them. Say: “Why then have ye slain the prophets of Allah in times gone by, if ye did indeed believe?”

Shaykh of shias Hashim al-Bahrani explained this verse in his book “Al-Lawami an-Noraniyah” (p 23):

Translation:

24 (verse) – and it is Truth confirming what is with them in words of Taala: When it is said to them, “Believe in what Allah Hath sent down, “they say, “We believe in what was sent down to us:” yet they reject all besides, even if it be Truth confirming what is with them.

Ayashi: Jabir said that Abu Jafar said: THIS VERSE WAS REVEALED UPON MUHAMMAD IN THIS FORM: And when it is said to them, what your Lord has revealed about Ali – (them) mean Banu Umeyyah. we do believe what was revealed upon us – meaning in their souls, and disbelieve all besides what Allah revealed about Ali, and  it is Truth confirming what is with them – meaning Ali.