الصديقون ثلاثة: حبيب النجار مؤمن آل ياسين الذي قال: وَجَاءَ مِنْ أَقْصَى الْمَدِينَةِ رَجُلٌ يَسْعَىٰ قَالَ يَا قَوْمِ اتَّبِعُوا الْمُرْسَلِيْنَ [يس:20،] وحزقيل مؤمن آل فرعون الذي قال: أَتَقْتُلُوْنَ رَجُلًا أَن يَّقُوْلَ رَبِّيَ اللّٰهُ [غافر: 28،] وعلي بن أبي طالب وهو أفضلهم.
The Siddiqun (especially righteous) are three: Habib al Najjar, the believer from the family of Yasin; about whom Allah says, “He said, ‘O my people, follow the messengers.’” (The second person is) Hizqil, the believer from the family of Firoun; about whom Allah says, “Do you kill a man [merely] because he says, ‘My Lord is Allah…’” (The third person is) ‘Ali ibn Abi Talib; and he is the most virtuous of them.
Al Qati’i and others narrate this hadith — from ‘Amr ibn Jumay’ — from Ibn Abi Layla — from his brother ‘Isa — from ‘Abdul Rahman ibn Abi Layla — from his father who said, “The Messenger of Allah salla Llahu ‘alayhi wa sallam said…”
The above wording of the hadith is Ibn ‘Asakir’s.
This hadith is mawdu’ (fabricated).
‘Amr ibn Jumay’ al Kufi is a kadhdhab (liar) and a wadda’ (fabricator).
His teacher is Muhammad ibn ‘Abdul Rahman ibn Abi Layla and he is sayyiʾ al hifz (possesses a weak memory).
Ibn Taymiyyah and al Albani both ruled the hadith a fabrication. Ibn Taymiyyah explained this at length in terms of its chain of transmission and matn (text).
 Surah Yasin: 20.
 Surah Ghafir: 28.
 Al Qati’i: Zawaʾid Fadaʾil al Sahabah, 2/1072-1117.
 Ibn Taymiyyah: Minhaj al Sunnah, 7/223; al Albani: Silsilat al Ahadith al Da’ifah, 1/355.