Riyad as-Saliheen 664
Ibn 'Umar (May Allah be pleased with them) reported:
Whenever we took a pledge of allegiance to Messenger of Allah ﷺ to hear and obey, he ﷺ would say to us, "As far as you are capable of."
[Al-Bukhari and Muslim].
وعنه قال: كنا إذا بايعنا رسول الله ﷺ على السمع والطاعة يقول لنا: “فيما استطعتم” ((متفق عليه))
Classification
Sahih (Authentic)
References
Riyad as-Saliheen 664
Riyad as-Saliheen Book of Miscellany, Hadith 664