The sunnan prayers (sunnah prior to and/or after fardh prayers and nawafil prayers) enhance any shortcomings within our compulsory prayers. They knew about the approaching of the Messenger Isa (AS) but when He arrived to them, they turned down him. Allah also educated them about Muhammad (Noticed), the unlettered prophet https://paxtongzikr.jaiblogs.com/57647959/the-basic-principles-of-jannah-firdaus