It is narrated from Hazrat Sahl (may Allah be pleased with him) that I never saw the Noble Prophet (peace and blessings be upon him) spreading his hands while supplicating on the pulpit or anywhere else. Whenever the Noble Prophet (peace and blessings be upon him) supplicated, he would keep his hands equal to his shoulders in front of him and would gesture with his finger.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22855
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف عبدالرحمن بن معاوية