Sunan An-Nasa'i

It was narrated from 'Abdullah bin Yasar, from Qutailah, a woman from Juhainah, that a Jew came to the Prophet and said:""You are setting up rivals (to Allah) and associating others (with Him). You say: 'Whatever Allah wills and you will,' and you say: 'By the Ka'bah.'"" So the Prophet commanded them, if they wanted to swear an oath, to say: ""By the Lord of the Ka'bah;"" and to say: ""Whatever Allah wills, then what you will