Ruling on those who do not wipe their heads as a whole while performing Wudu'

Q: What is the ruling on whoever does not wipe the whole head with water while making Wudu’ (ablution)? Is their Wudu’ valid?

A: All praise be to Allah Alone, and peace and blessings be upon His Messenger, and his family and Companions. It is obligatory to wipe the entire head with water while making Wudu’ for Allah (Exalted be He) says (what means): ...rub (by passing wet hands over) your heads Moreover, it is related by Al-Bukhari and Muslim on the authority of `Abdullah ibn Zayd ibn `Asim (may Allah be pleased with them both) regarding the manner of making Wudu’ that he, ‘Abdullah, said: (Part No. 5; Page No. 212)  “The Messenger of Allah (peace be upon him) wiped his head; passing his (wet) hands from the front of the head to the back and then to the front again.” According to another narration from Al-Bukhari and Muslim: “He started with the front of his head to the back of his head and vice versa (beginning from the front and taking his hands to the back of his head up to the nape of the neck and then brought them to the front again from where he had started).” May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.