It’s official! Here are the top ten suras in the Qur’án, according to Bahá’u’lláh:
The following list was compiled by calculating the ratio of citations to each sura in Bahá’u’lláh’s writings (AFAIK) to the number of verses in that sura, giving some slight weighting to the absolute number of citations. A verse used by Bahá’u’lláh is selected for each sura, with preference given to verses according to the number of times each was cited.
The Cow (2): 42/286
Verily we are God’s, and to Him shall we return.
The Kneeling (45): 5/37
And when he becometh acquainted with any of Our verses he turneth them to ridicule. There is a shameful punishment for them!
The Spider (29): 9/69
Whoso maketh efforts for Us, in Our ways shall We assuredly guide him.
Abraham (14): 6/52
We had sent Moses with Our signs, saying unto him: ‘Bring forth thy people from darkness into light and remind them of the days of God.’
Cattle (6): 18/165
SAY: “It is God:” then leave them to their pastime of cavillings.
KAF (50): 5/45
On that day will We cry to Hell, “art thou full?”, and it shall say, “are there more?”
The Merciful (55): 7/78
Verily, His ways differ every day.
The Emigration (59): 4/24
And be ye not like those who forget God, and whom He hath therefore caused to forget their own selves. These are the wicked doers.
Iron (57): 4/29
He is the first and the last; the seen and the hidden; and He knoweth all things!
Man (76): 4/31
Verily the righteous shall drink of a winecup tempered at the camphor fountain.
Honorable mention: The Made Plain (41) 5/54, The Family of Imran (3) 17/200, & Houd (11) 10/123.