Written by: Fazilat al-Sheikh Ghulam Mustafa Zaheer Amanpuri Hafizahullah
Nafi, may Allah have mercy on him, states:
[كان ابن عمر إذا رأى رجلا لا يرفع يديه حصبه وأمره أن يرفع]
When Sayyiduna Abdullah bin Umar, may Allah be pleased with them both, saw a person not raising his hands, he would throw pebbles at him and command him to raise his hands.
Reference: Juz' Raf' al-Yadain by al-Bukhari: 14, Al-Tamhid by Ibn Abd al-Barr: 224/9, and its chain is authentic