Is 'Umar ibn al-Khattab's (may Allah be pleased with him) increase of the tarawih prayer to twenty rak'ahs considered an innovation?

Question:
He says: Honorable Shaykh, may Allah grant you success, 'Umar's action of increasing the tarawih prayer to twenty rak'ahs, and likewise the increase in the lashing for the one who drinks intoxicants, is that considered an innovation?

Answer:
I seek refuge in Allah. 'Umar's action is not an innovation. 'Umar was one of the Rightly Guided Caliphs, and the Messenger (peace and blessings be upon him) said: "Hold fast to my Sunnah and the Sunnah of the Rightly Guided Caliphs." 'Umar was the second of the Rightly Guided Caliphs (may Allah be pleased with him and grant him satisfaction). The increase in tarawih is because the Messenger (peace and blessings be upon him) did not specify a number.
The Messenger (peace and blessings be upon him) encouraged standing in prayer during Ramadan but did not specify a limit. He did not set a limit. He did not say, "Pray twenty rak'ahs," or "Pray ten," or "Pray five." He said nothing of the sort. He said, "Whoever stands in prayer during Ramadan out of faith and seeking reward..." and he did not specify a number. So 'Umar took the general ruling, because the Messenger (peace and blessings be upon him) spoke generally about standing in prayer during Ramadan.
He was one of the Caliphs, indeed the second of the Rightly Guided Caliphs, so his action is a Sunnah. The Messenger (peace and blessings be upon him) advised holding fast to the Sunnah of the Rightly Guided Caliphs. Likewise, the increase in the punishment for intoxicants was because people persisted in drinking intoxicants.
The Messenger (peace and blessings be upon him) did not specify the number of lashes for intoxicants. Rather, the narrator said, "He was lashed approximately forty lashes," approximately forty, and he did not say, "Do not exceed forty." So the Messenger (peace and blessings be upon him) did not specify the number of lashes, and there was room for increase for the sake of public benefit and deterrence, and this was by the consensus of the Companions whom 'Umar (may Allah be pleased with him) consulted. Yes.