ibn Abbas · The Chapters on Expiation

the Messenger of Allah (ﷺ) said: "Whoever takes an oath, and swears, saying: 'By Al-Lat and Al-Uzza,' let him say:'La ilaha illallah.' "

"We went out looking for the Messenger of Allah (ﷺ) and Wa'il bin Hujr was with us. An enemy of his seized him and the people were reluctant to swear an oath but I swore that he was my brother, so they set him free. We came to the Messenger of Allah (ﷺ) and I told him that the people had been reluctant to swear an oath, but I had sworn that he was my brother. He said: 'You told…

"Your oath is as your companion understands it to be."