Please answer a question about the following article about Portugal:

Within the white inescutcheon, the five quinas (small blue shields) with their five white bezants representing the five wounds of Christ (Portuguese: Cinco Chagas) when crucified and are popularly associated with the "Miracle of Ourique". The story associated with this miracle tells that before the Battle of Ourique (25 July 1139), an old hermit appeared before Count Afonso Henriques (future Afonso I) as a divine messenger. He foretold Afonso's victory and assured him that God was watching over him and his peers. The messenger advised him to walk away from his camp, alone, if he heard a nearby chapel bell tolling, in the following night. In doing so, he witnessed an apparition of Jesus on the cross. Ecstatic, Afonso heard Jesus promising victories for the coming battles, as well as God's wish to act through Afonso, and his descendants, in order to create an empire which would carry His name to unknown lands, thus choosing the Portuguese to perform great tasks.

On what date did the Battle of Ourique take place?
25 July 1139