Hadith 5:19
Anas (May Allah be pleased with him) reported that he passed by some children and greeted them. Then he said:
"Messenger of Allah (ﷺ) used to do the same." [Al-Bukhari and Muslim]
عن أنس رضي الله عنه أنه مر على صبيان، فسلم عليهم، وقال: كان رسول الله صلى الله عليه وسلم يفعله” ((متفق عليه))