(11) باب الاِسْتِثْنَاءِ فِي الْيَمِينِ
Narrated Abdullah ibn Umar:
The Prophet (ﷺ) said: If anyone says when swearing an oath: "If Allah wills," he makes an exception.
Reference: Sunan Abi Dawud 3261
In-book reference: Book 22, Hadith 20
English translation: Book 21, Hadith 3255