The Sunnah with regard to reciting Soorat al-Sajdah and al-Insaan in full in Fajr on Fridays

We cannot say that what they are doing is bid’ah, but we can say that what they are doing is playing with the Sunnah. If they were really sincere about following the Prophet (peace and blessings of Allaah be upon him) then let them do what he did. Hence Ibn al-Qayyim (may Allaah have mercy on him) described people like this as ignorant imams. We say: If you are able to recite Soorat al-Sajdah in the first rak’ah and Soorat al-Insaan in the second, then do that. If you are not able to do that then recite another soorah so that you will not be dividing the Sunnah and toying with it. The Sunnah is known: the Prophet (peace and blessings of Allaah be upon him) used to recite Soorat al-Sajdah in the first rak’ah of Fajr on Friday and Soorat al-Insaan in the second rak’ah. So you should either do what the Prophet (peace and blessings of Allaah be upon him) did, or recite another soorah, because dividing or separating what the Prophet (peace and blessings of Allaah be upon him) did is going against the Sunnah and is undoubtedly toying with the Sunnah. Follow the guidance of your Prophet Muhammad (peace and blessings of Allaah be upon him) and be courageous, because if you recite Soorat al-Sajdah in the first rak’ah and Soorat al-Insaan in the second, some imams will say, “Why did you recite for so long? The Prophet (peace and blessings of Allaah be upon him) got angry with Mu’aadh (may Allaah be pleased with him) and rebuked him for that.” 

But we say: Everything that the Prophet (peace and blessings of Allaah be upon him) did was reasonable and not heavy, even if he recited Soorat al-Sajdah and al-Insaan. Hence Anas ibn Maalik (may Allaah be pleased with him) said: “I never prayed behind any imam whose prayer was lighter and more complete than the Messenger of Allaah (peace and blessings of Allaah be upon him).”