Al-Tirmidhi said: "This is a hasan sahih hadith." The majority of the people of knowledge from the Salaf and those who came after them hold the opinion that waqf is valid. Jabir said: "None of the Companions of the Prophet (peace and blessings of Allah be upon him) who possessed wealth failed to establish a waqf." Shurayh did not view waqf as valid and said: "There is no sequestration (habs) regarding the obligatory duties of Allah." Ahmad said: "This is the school of the people of Kufa." Abu Hanifa held that a waqf does not become binding merely by its declaration, and the endower may retract it, unless he bequeaths it for after his death, in which case it becomes binding, or if a judge rules it to be binding. Some attributed this view to Ali, Ibn Mas'ud, and Ibn Abbas. His two companions (Abu Yusuf and Muhammad ibn al-Hasan) differed with him, saying the same as the rest of the people of knowledge. Some of them argued using what was narrated: that Abdullah ibn Zayd, the possessor of the Adhan, made his garden a charity and entrusted it to the Messenger of Allah (peace and blessings of Allah be upon him). His parents came to the Messenger of Allah (peace and blessings of Allah be upon him) and said: "O Messenger of Allah, we had no means of livelihood except this garden." So the Messenger of Allah (peace and blessings of Allah be upon him) returned it to them, and then they both died, and he inherited it from them. Al-Mahamili narrated it (4) in his "Amali" (5). Furthermore, because he distributed his wealth for the sake of piety from his own property, it did not become binding merely by the statement, similar to ordinary charity. This view contradicts the sunnah established by the Messenger of Allah (peace and blessings of Allah be upon him) and the consensus of the Companions (may Allah be pleased with them), for the Prophet (peace and blessings of Allah be upon him) said to Umar regarding his waqf: "Its essence is neither sold, nor purchased, nor gifted, nor inherited." Al-Tirmidhi said: "Practice is according to this hadith among the people of knowledge from the Companions of the Prophet (peace and blessings of Allah be upon him) and others; we do not know of any disagreement among [any of] (6) the early ones among them regarding that." Al-Humaydi said: "Abu Bakr gave his house as charity to his children, Umar gave his land at al-Marwah to his children, Uthman gave Rumah (7) as charity, Ali gave his land in Yanbu as charity, and al-Zubayr gave his house in Mecca [and his house in Egypt and his assets in Medina] (6) as charity to his children,"