The Prophet (ﷺ) called 'Uthman b. Maz'un. When he came to him, he said: 'Uthman, did you dislike my practice ? He said: No, by Allah, but I seek your practice. He said: I sleep, I pray, I keep fast, I (sometimes) leave fast, and I marry women. Fear Allah, 'Uthman, your wife has a right on you, your guest has a right on you, your self has a right on you ; you should keep fast and (sometimes) leave fast, and pray and sleep.
Sunan Abi Dawud Book 5, Hadith 120
← Previous Hadith The Messenger of Allah (ﷺ) as saying: Choose such actions as you are capable of performing, for Allah does not grow weary till you do. The acts most pleasing to Allah are those which are done most continuously, even if they amount to little. Whenever he began an action, he would do it continuously.

Sunan Abi Dawud Book 5, Hadith 119 Next Hadith → 'Aishah was asked about the actions of the Messenger of Allah (ﷺ). Did he perform some actions exclusively on some particular days ? She said: No, he performed his actions regularly. Which of you has the strength as much as the Messenger of Allah (ﷺ) had ?

Sunan Abi Dawud Book 5, Hadith 121