'Amr ibn Shu'ayb reported from his grandfather that the Messenger of Allah ﷺ said, "Anyone who does not show mercy to our children nor acknowledge the right of our old people is not one of us."

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَيْسَ مِنَّا مَنْ لَمْ يَرْحَمْ صَغِيرَنَا وَيَعْرِفْ حَقَّ كَبِيرِنَا