Quran:  Allah Almighty says, "O you who believe! Be steadfast; be supreme in steadfastness" (S3 V200),

 Hadith:  Ibn Mas'ud reported that the Messenger of Allah, may Allah bless him and grant him peace, said, 'After I am gone there will be misappropriation and matters of which you disapprove." They said, "O Messenger of Allah, what do you command us to do?" He said, "To fulfill the rights you owe to others and to ask Allah for what is owed to you." [Agreed upon]