Sahih Bukhari

Narrated `Abdullah:(the slave of Asma') During the night of Jam', Asma' got down at Al-Muzdalifa and stood up for (offering) the prayer and offered the prayer for some time and then asked, ""O my son! Has the moon set?"" I replied in the negative and she again prayed for another period and then asked, ""Has the moon set?"" I replied, ""Yes."" So she said that we should set out (for Mina), and we departed and went on till she threw pebbles at the Jamra (Jamrat-Al-`Aqaba) and then she returned to her dwelling place and offered the morning prayer. I asked her, ""O you! I think we have come (to Mina) early in the night."" She replied, ""O my son! Allah's Messenger (ﷺ) gave permission to the women to do so