Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق · The Book of Oaths and Vows

"Whoever swears by a religion other than Islam, telling a lie, will be as he said, and whoever kills himself with something will be punished with it in the Hereafter."

"The Messenger of Allah said: 'There is no vow to commit an act of disobedience, and its expiation is the expiation for an oath.'"

The Messenger of Allah said: "There is no vow to commit an act of disobedience and its expiation is the expiation for an oath." Mansur bin Zadhan contradicted him in his wording.

The Messenger of Allah said: "There is no vow to commit an act of disobedience or with regard to that which the son of Adam does not possess."