It is narrated from Sayyiduna Ibn Abzi that when the Prophet (ﷺ) would sit and supplicate in prayer, he would place his right hand on his thigh and gesture with his finger while supplicating.
Hadith Referenceمسند احمد / مسند المكيين / 15370
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لجهالة حال أبى سعيد الخزاعي، وقد اختلف فى كنيته