Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah Narrated Abdullah (Radi-Allahu ‘anhu):
The Prophet (Sallallahu ‘Alaihi Wa Sallam) said, “Whoever has to take an oath should swear by Allah or remain silent.” (i.e. He should not swear by other than Allah.)
Bukhari Vol. 3 : No. 844