The ruling on the story of 'Umar calling out to Sariyah al-Jabal

Question:
It is reported in the biography of 'Umar ibn al-Khattab that he said one day while delivering a sermon, "O Sariyah al-Jabal, give the warning!" Is this story authentic or not? And is it a karamah (a miracle granted to a righteous person)?

Answer:
Yes, it is narrated that 'Umar ibn al-Khattab was one day delivering a sermon in the mosque of the Messenger (peace and blessings be upon him). There was an army he had sent to the East to fight the mushrikin (those who associate partners with Allah). This army was facing harassment from the disbelievers, so the condition of this army came to 'Umar's mind while he was preaching. He called out, "O Sariyah al-Jabal!" Sariyah was the commander of this army. Sariyah heard this voice and recognized it as 'Umar's voice. He and those with him took refuge in the mountain, and they were saved from the evil of their enemy.
This is how this story is viewed. If it is established, it is a karamah for 'Umar (may Allah be pleased with him). However, the correct view is that it is not established. The position of the meticulous scholars is that this story is not established. But if it were established, it would indicate one of the karamahs of 'Umar (may Allah be pleased with him).