He informed him that Abdullah bin Umar used to send the weaker members of his household ahead so that they would stop at the Sacred Landmark in Muzdalifa during the night, remember Allah as much as they wished, and then move on before the imam stopped there and before he departed. Some of them would arrive at Mina in time for the dawn prayer, while others would arrive after that. Once they arrived, they would throw pebbles at the pillar.Ibn Umar used to say, "The Messenger of Allah ﷺ granted such people this concession."
و حدثني أبو الطاهر وحرملة بن يحيى قالا أخبرنا ابن وهب أخبرني يونس عن ابن شهاب أن
أخبره أن عبد الله بن عمر كان يقدم ضعفة أهله فيقفون عند المشعر الحرام بالمزدلفة بالليل فيذكرون الله ما بدا لهم ثم يدفعون قبل أن يقف الإمام وقبل أن يدفع فمنهم من يقدم منى لصلاة الفجر ومنهم من يقدم بعد ذلك فإذا قدموا رموا الجمرة وكان ابن عمر يقول أرخص في أولئك رسول الله ﷺ