(6) باب الْجَمْعِ بَيْنَ الصَّلاَتَيْنِ فِي الْحَضَرِ
Ibn 'Abbas reported that the Messenger of Allah (ﷺ) observed in Medina seven (rak'ahs) and eight (rak'ahs), i. e. (be combined) the noon and afternoon prayers (eight rak'ahs) and the sunset and 'Isha' prayers (seven rak'ahs).
Reference: Sahih Muslim 705 f
In-book reference: Book 6, Hadith 66
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1522