What is the ruling on the supplication: "O Allah, do not test me through my children"?

This supplication is permissible, but it is better to supplicate with the prescribed (ma'thur) prayers, asking Allah for 'afiyah (well-being/safety) for one's children, as it is authentically narrated in the hadith (definition) of Ibn 'Umar, may Allah be pleased with them both, that the Prophet, may Allah's peace and blessings be upon him, used to supplicate: "O Allah, I ask You for 'afiyah in this world and the Hereafter. O Allah, I ask You for pardon and 'afiyah in my religion, my worldly affairs, my family, and my wealth."