Sunan Ibn Majah 2117
سنن ابن ماجه#2117SahihIt was narrated from Ibn 'Abbas that the Messenger of Allah (ﷺ) said:'When anyone of you swears an oath, let him not say: 'What Allah wills and what you will.' Rather let him say: 'What Allah wills and then what you will
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan Sahih
Muhammad Fouad Abd al-BaqiHasan Sahih
Shuaib Al ArnautSahih Lighairihi
Zubair Ali ZaiHasan
In-book reference: 11:28