Sunan an-Nasa'i, Volume 3, Book 24, Hadith 2649 (DarusSalam) ⓘ
It was narrated that Ibn 'Abbas said: "The Messenger of Allah set out and when he was in Ar-Rawha he met some people and said: 'Who are you?' They said: 'Muslins.' They said: 'Who are you?' They said: 'The Messenger of Allah.' A woman brought a child out of the litter and said: 'Is there Hajj for this one?' He said" "Yes, and you will be rewarded.'''(Shih)
أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، قَالَ حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنَا إِبْرَاهِيمُ بْنُ عُقْبَةَ، ح وَحَدَّثَنَا الْحَارِثُ بْنُ مِسْكِينٍ، قِرَاءَةً عَلَيْهِ وَأَنَا أَسْمَعُ، - وَاللَّفْظُ لَهُ - عَنْ سُفْيَانَ، عَنْ إِبْرَاهِيمَ بْنِ عُقْبَةَ، عَنْ كُرَيْبٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ صَدَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَلَمَّا كَانَ بِالرَّوْحَاءِ لَقِيَ قَوْمًا فَقَالَ " مَنْ أَنْتُمْ " . قَالُوا الْمُسْلِمُونَ . قَالُوا مَنْ أَنْتُمْ قَالُوا رَسُولُ اللَّهِ . قَالَ فَأَخْرَجَتِ امْرَأَةٌ صَبِيًّا مِنَ الْمِحَفَّةِ فَقَالَتْ أَلِهَذَا حَجٌّ قَالَ " نَعَمْ وَلَكِ أَجْرٌ " .
also referenced under: Hadith 2648 (Reference) & Book 24, Hadith 0 (In-Book)