Raising the hands when supplicating

It is narrated from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) that when revelation descended upon the Messenger of Allah (peace and blessings be upon him), a sound like the buzzing of bees would be heard near his blessed face. We remained silent for a while; then he (peace and blessings be upon him) turned towards the qiblah, raised his hands and said: 'Allahumma zidna wa la tanqusna, wa akrimna wa la tuhinna, wa a'tina wa la tahrimna, wa athirna wa la tu'thir 'alayna, wardha 'anna wa ardina' (O Allah, give us more and do not decrease us, honour us and do not disgrace us, give to us and do not deprive us, favour us and do not favour (others) over us, and be pleased with us and make us pleased (with what You give)). Then he (peace and blessings be upon him) said: "Ten verses have been revealed to me; whoever abides by them will enter Paradise." Then he (peace and blessings be upon him) recited this verse: "Successful indeed are the believers" [Surah al-Mu'minun: 1].
This hadith is sahih al-isnad (authentic in its chain), but the two Shaykhs did not record it.

It is narrated from Sayyiduna Salman (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah is too modest to let a servant raise his hands to Him and then turn them back empty and disappointed."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), and they did not record it.

It is narrated from Sayyiduna Umayr (may Allah be pleased with him), the freed slave of Abi al-Lahm, that he saw the Messenger of Allah (peace and blessings be upon him) at the place called Ahjar al-Zayt supplicating, with his palms raised towards his blessed face.
This hadith is sahih al-isnad (authentic in its chain), but the two Shaykhs did not record it.

It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that he said: I never saw the Prophet (peace and blessings be upon him) supplicating with his hands raised high, neither on his pulpit nor anywhere else. He (peace and blessings be upon him) would hold his two fingers level with his shoulders and supplicate.
This hadith is sahih al-isnad (authentic in its chain), but the two Shaykhs did not record it.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that a man was supplicating while pointing with two fingers, so the Messenger of Allah (peace and blessings be upon him) said: "One (point with one finger), one."

It is narrated from Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) that he said: The Prophet (peace and blessings be upon him) passed by me while I was supplicating with my fingers, and he (peace and blessings be upon him) said: "One (point with one finger), one," and he (peace and blessings be upon him) pointed with his index finger.
This hadith is sahih (authentic) through both chains, and the narration of Abu Mu'awiyah is sahih on the condition of the two Shaykhs, provided that Abu Salih al-Samman's hearing from Sayyiduna Sa'd is established.