Is it permissible to recite one long verse (after Surah Faatihah)?
Some of the scholars say the minimum that he can recite along with (Surah) Faatihah is three verses whether they be long or short. They based it upon that the Prophet would recite a surah along with Faatihah while the shortest surah in Quran is three verses. Also, some of the other scholars say there is no specific amount one has to read because Allah says:
فَاقْرَءُوا مَا تَيَسَّرَ مِنَ الْقُرْآنِ (Surah al-Muddaththir 74:20)
“Read from the Quran of what has been made easy”
This opinion is more correct. However this is based upon (the condition) that he recites a verse that is not incomplete whereas it requires the verses after it to be understood correctly and Allah knows best.
~ Abu Fajr AbdulFattaah bin Uthman
Over here, the lajnah stated that “It is Sunnah to recite Surahs or some Ayahs (Qur’anic verses) along with Al-Fatihah (Opening Chapter of the Qur’an). No specific portion is stated. It is Wajib to recite Al-Fatihah; any more Qur’an recited after it is Sunnah. So, you may recite along with it Surah Al-Shams, Al-Layl, Al-Duha, Al-Sharh, Al-Tin, Al-`Alaq or any other Surahs or Ayahs. If you recite some Ayahs or one Ayah after Al-Fatihah, it will be good. All the foregoing is acceptable – praise be to Allah. May Allah grant us all success.”
~ Abu Layth (Aashir Khan)