Hazrat Hisham states that his father, Hazrat Urwah, said regarding Qasamah that it has been continuously practiced both in the era of ignorance and in Islam.

Hazrat Basheer bin Yasar, an Ansari man whose name was Sahl bin Abu Hathma, narrates that a group from his tribe went towards Khaybar. When they reached there, they dispersed, and then they found one of their companions dead. They said to those with whom they found him dead, "You have killed our companion." They replied, "We did not kill him, nor do we know who the killer is." Then these people came to the Prophet of Allah (peace and blessings be upon him) and said, "O Prophet of Allah! We went to Khaybar and there we found one of our companions dead." The Messenger of Allah (peace and blessings be upon him) said, "Call the chief, call the chief." Then he (peace and blessings be upon him) said to them, "Bring witnesses against the one who killed him." They said, "We have no witnesses." The Prophet (peace and blessings be upon him) said, "Then the Jews will swear an oath for you." They said, "We are not satisfied with the oath of the Jews." So the Prophet of Allah disliked letting his blood go in vain, and he (peace and blessings be upon him) paid his blood money—one hundred camels—from the camels of charity.

Imam Zuhri states that the Noble Prophet (peace and blessings be upon him) ruled in the case of Qasamah that the oath would be obligatory upon the defendants.

Hazrat Ubaidullah bin Umar states that he heard his companions narrate that Hazrat Umar bin Abdul Aziz initiated the practice that the defendants would be required to take an oath, then he made them responsible for the payment of blood money.

Hazrat Fudayl bin Amr narrates that Hazrat Ibn Abbas (may Allah be pleased with them) gave the verdict of oath upon the defendants.

Hazrat Zuhri states that Hazrat Saeed bin Musayyib held the opinion that the oath is obligatory upon the defendants.

Hazrat Zuhri states that the Messenger of Allah (peace and blessings be upon him) gave the verdict of oath upon the defendants.

Hazrat Ibn Jurayj states that I asked Hazrat Ibn Shihab whether taking an oath regarding blood is based on knowledge or with certainty? He replied: With certainty.

Hazrat Ibn Sirin states that Hazrat Shurayh said regarding Qasamah: I will consider them guilty even though I know, that is, I will make them swear that neither have we committed the murder nor do we have any knowledge of the killer.

Hazrat Hasan bin Abdullah narrates that Ibrahim said: Each man among them will be made to swear an oath as follows: "By Allah, I did not kill, nor do I know the killer." Then the blood money will be paid.