Reference: Liqaa.aat al-Baab al-Maftooh – Volume 1, Page 49, Number 78
Question: Is it permissible to combine [the reciting of] two Soorahs in a single rak’ah of an obligatory prayer?
Response: There is no harm in combining [the reciting of] two Soorahs in a single rak’ah of an obligatory prayer. However, if doing so causes difficulty for the congregation behind him in an obligatory prayer, then it should not be done.
