Sayyiduna Abd al-Rahman bin Abza (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) would do like this in his prayer. He described this by pointing with his index finger.
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir from Abu Sa'id al-Khuza'i, from Sayyiduna Abd al-Rahman bin Abza (may Allah be pleased with him). No one other than Mansur bin al-Mu'tamir narrated from Abu Sa'id al-Khuza'i, as Ibn Abi Hatim has stated on the authority of his father.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2846