TAKING CHILDREN ON PILGRIMAGE H H 180 "The Messenger of Allah, praise and peace be upon him, encountered a party of mounted men at Rauha and asked them: 'Who are you?' They answered: 'Muslims' and inquired who he was. He replied: 'The Messenger of Allah, praise and peace be upon him'. A woman among them lifted a boy up to him and asked: 'Can this child take part in the Pilgrimage?' He said: 'Yes, and you will have the reward.'" R 180 Muslim with a chain up to ibn Abbas who related this.
179- وعن ابن عباس رضي الله عنهما : أنَّ رَسُول الله صلى الله عليه وآله وسلم لَقِيَ رَكْباً بالرَّوْحَاءِ ، فَقَالَ : "مَنِ القَوْمُ ؟" قالوا : المسلمون ، فقالوا : من أنتَ ؟ قَالَ : "رَسُول الله" ، فرفعت إِلَيْه امرأةٌ صبياً ، فَقَالَتْ : ألِهَذَا حَجٌّ ؟ قَالَ : "نَعَمْ ، وَلَكِ أجْرٌ" رواه مسلم .