Hadith 8:2684
Abu Bakr narrated to us, he said: Abu Khalid narrated to us, from Ibn Jurayj, from ‘Amr, he said: Someone who saw some of the wives of the Prophet (may Allah bless him and grant him peace) informed me that she would throw [the pebbles] whether the sun had set or had not set.
حدثنا أبو بكر قال نا أبو خالد عن بن جريج عن عمرو قال أخبرني من رأى بعض أزواج النبي صلى الله عليه وسلم ترمي غربت الشمس أو لم تغرب