Umm Habibah (May Allah be pleased with her) the Mother of the Believers reported:
I heard the Messenger of Allah (ﷺ) saying, "A house will be built in Jannah for every Muslim who offers twelve Rak'ah of optional Salat other than the obligatory Salat in a day and a night (to seek the Pleasure of Allah)."[Muslim]. (DE)
App reference (DE): Book 9, Hadith 107 (DE)
Arabic/English book reference (DE): Book 9, Hadith 1097 (DE)