و ربك ف ك بر[wa Rabaka Fa Kabir]
(focus on the consonants only in the arabic language)
And your Lord (Allah) magnify! [so magnify your Lord]
[Quran Surah Mudatthir 74:3]
What is a Palindrome?
A word or phrase that reads the same backward as forward.
A challenge to those who reject the linguistic miracle of Qur'an:
Can you provide a meaningful sentence - in any language - which can be written in a Palindrome form? The above aayah/verse has 4 words in a Palindrome form, so the challenge for them is to beat that.
Some points to add to this that were mentioned:
1) It was spoken and the one who spoke it was illiterate. It's pretty darn hard to come up with a palindrome when you sit down and work it out, yet it might be possible, but to speak it out of the blue -> you only get one shot at getting it right because what is being is said is memorized instantly and written down. You can't go back and modify it. Plus the speaker himself, the Messenger (saw), is illiterate so it's not like he could have sat down before hand and worked through it.
2) It was recited together with the verses before and after it. I.e. it's right in the middle of a passage and the fact that the verse being a palindrome fits so well in the context of what's being said and doesn't take anything away from the coherency and meaning.
3) It was unknown at the time but discovered later by linguistic scholars who spent their time looking through the Qur'an for such aspects of linguistic excellence. It's not like the Prophet (saw) went around and said look, this verse has a palindrome. It's just there.