Aamir bin Abdullah narrates from his father: When the Prophet Muhammad (peace be upon him) sat in Tashahhud, he would place his left hand on his left knee and his right hand on his right knee. He would gesture with his index finger, and his gaze would not go beyond his gesture.
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 1944
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيحسن صحيح - «صحيح أبي داود» (910).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده قوي على شرط مسلم.