Though he was an infallible prophet sent by Allah, Prophet Muhammad (a.s.) consulted with his companions about most political and social affairs following the saying of Allah to him (and consult with them upon the matter).[26] Abu Hurayra narrated, “I have never seen anyone more consulting with his companions than the messenger of Allah.”[27]
Surely, the Prophet (a.s.) was in no need of anyone’s opinion, but he consulted with his companions to unite and spread love among them. Historians say, “He (the Prophet) consulted even with women and he regarded their opinions.”[28]
[26] Qur'an, 3:159.
[27] Sunan al-Bayhaqi, vol. 7 p. 45.
[28] At-Tathkira al-Hamduniyyah, vol. 1 p. 312.
source : http://www.maaref-foundation.com