´'Amr bin 'Abdullah bin Az-Zubair narrated that:` His father said: "When the Messenger of Allah (ﷺ) sat in the second or fourth rak'ah, he would place his hands on his knees and point with his finger."
Hadith Referenceسنن نسائي / كتاب التطبيق / 1162
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده صحيح