Sunan An-Nasa'i

It was narrated from Sa'd bin Jubair, from Al-Aswad bin Yazid, that Aishah said:""The Messenger of Allah (ﷺ) said: 'Whoever has the habit of praying at night but he sleeps and misses it, that is a charity that Allah (SWT) has given to him, and the reward of his prayer will be recorded for him