Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: I have not seen anyone who consulted his companions more than the Prophet (peace and blessings be upon him).
Imam al-Shafi'i (may Allah have mercy on him) said: Allah Almighty says: "And their affairs are (conducted by) consultation among themselves." [Surah al-Shura: 38]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13303
It is narrated from Imam al-Shafi'i (may Allah have mercy on him) that Imam Hasan al-Basri (may Allah have mercy on him) used to say: The Prophet (peace and blessings be upon him) had no need of consultation; (he consulted) so that the rulers after him would take it as a sunnah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13304