It was narrated that Anas bin Malik said: The people of the Jahiliyyah had two days each year when they would play. When the Messenger of Allah (ﷺ) came to Al-Madinah he said: 'You had two days when you would play, but Allah (SWT) has given Muslims something instead that is better than them: the day of Al-Fitr and the day of Al-Adha.'
It was narrated that Ibn 'Umar said: The oath by which the Messenger of Allah used to swear was: 'No, by the Controller of the hearts.'