What is the ruling regarding a prayer performed without recitation mentioned by Umar ibn al-Khattab?

Primary text

Umar ibn al-Khattab (may Allah be pleased with him) prayed a prayer in which he did not recite. When informed, he stated that he had prepared an army for the Muslims until they reached Wadi al-Qura, implying that preoccupation with weighty matters of state justified the oversight regarding the specific component of recitation in that instance.