" يَوْمَئِذٍ يُوَفِّيهِمُ اللَّهُ دِينَهُمُ الْحَقَّ وَيَعْلَمُونَ أَنَّ اللَّهَ هُوَ الْحَقُّ الْمُبِينُ" (نور/25)
“On that day Allah will pay them their just due, and they will know that Allah, He is the Manifest Truth.” [Al-Nur/25]
So, the Baha’is claim for coming a new and more complete religion after Islam.
And can’t be said the more complete religion will be Islam because according to the holy Quran Islam completed in Hajjtul Weda’a:
"... الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِي وَرَضِيتُ لَكُمُ الْإِسْلَامَ دِينًا ... "(المائده/3)
“This day have I perfected your religion for you and completed My favor unto you, and have chosen for you as religion Al-ISLAM…” [Al-Maidah/3]
It means that a perfect religion will be sent down after Islam.
1) The word "دین" in the verse 25 of chapter Nur to which the Baha’is are adducing means reward it doesn’t mean a religion.
2) The verse adduced by the Baha’is is related to the day of judgment because the previous verses are discussing about the day of judgment. Its previous verse is stating:
" يَوْمَ تَشْهَدُ عَلَيْهِمْ أَلْسِنَتُهُمْ وَأَيْدِيهِمْ وَأَرْجُلُهُمْ بِمَا كَانُوا يَعْمَلُونَ" (نور/24)
“On the day when their tongues and their hands and their feet testing against them as to what they used to do.” [Al-Nur/24]
3) The verse related to the religion perfection in Maidah chapter is one of the last verse of the holy Quran and has been sent down after the verse adduced by the Baha’is.
 Refer to Abul Fadhl Golpaygani, Faraed, the Indian publishing house, Mahdi Balozbaki street, Shawwal 1315 A.H. p. 282.
 Sheikh Tabarsi, Majmaul Bayan interpretation, the electronic library of Feqahat, Vol. 7, p. 235; Refer to Zamakhshari, Zamakhshari’s interpretation called Al-Koshaf An haqaiyeq Ghawamezul Tanzil, the e;ectronic library of Feqahat, Vol. 3, p. 223.
 Refer to Muhammad Hadi Ma’refat, Al-Tamhid Fi Oloum Al-Quran, Qom, Al-Tamhid publishing and cultural institute, 1428 A.H. Vol. 1, p. 129.