question #3 Sahih al-Bukhari 3935, Book 63, Hadith 160 : What was the original prescription for the number of rak’ahs in each prayer before the migration?

Originally, two rak`at were prescribed in every prayer. When the Prophet (ﷺ) migrated (to Medina) four
rak`at were enjoined, while the journey prayer remained unchanged(i.e. two rak`at).