What is the ruling on one who trims his beard and cites the action of Ibn 'Umar (may Allah be pleased with him and his father)?

Question:
Honorable Shaykh, may Allah grant you success. He says: Taking from the beard, or what is called trimming it, and they cite the action of Ibn 'Umar (may Allah be pleased with him and his father). He says: How should one respond to that? And what is it?

Answer:
They cite the saying of the Messenger (peace and blessings be upon him): "Let the beards grow." They follow the action of Ibn 'Umar and leave the saying of the Messenger: "Let them grow," meaning leave them alone, do not take anything from them, let the beards grow, let the beards hang down. All of these are narrations in the authentic collections. Why do they go to the action of a Companion when there is an explicit text from the Messenger (peace and blessings be upon him)? And Ibn 'Umar did not do this constantly. It is only established that he did it when he exited the state of ihram; he considered it part of exiting ihram, as an exercise of his independent legal reasoning. Yes.