The waking up of the Prophet ﷺ from his sleep for the night prayer and what (how much) was cancelled from the night prayer

And the Statement of Allah تعالى: “O you wrapped in garments (i.e. Prophet Muhammad ﷺ)! Stand (to pray) all night, except a little. Half of it, or a little less than that, or a little more; and recite the Qur'an (aloud) in a slow (pleasant tone and) style. Verily, We shall send down to you a weighty Word (i.e. obligations, laws). Verily, the rising by night (for Tahajjud prayer) is very hard and most potent and good for governing (oneself), and most suitable for (understanding) the Word (of Allah). Verily, there is for you by day prolonged occupation with ordinary duties.” (V.73:1-7) And Allah's Statement: “…He knows that you are unable to pray the whole night, so He has turned to you (in mercy). So, recite you of the Qur’an as much as may be easy for you. He knows that there will be some among you sick, others travelling through the land, seeking of Allah’s Bounty, yet others fighting in Allah’s Cause. So recite as much of the Qur’an as may be easy (for you), and perform As-Salat (Iqamat-as-Salat) and give Zakat, and lend to Allah, a goodly loan, and whatever good you send before you for yourselves, (i.e. Nawafil — non-obligatory acts of worship: prayers, charity, fasting, Hajj and Umra, etc.), you will certainly find it with Allah, better and greater in reward...” (V.73:20)