Is there proof the Quran is from GOD?
A book that claims to supersede every other book must carry its own proof. The Quran says it does: a structure built on the number 19, beginning with its first verse of 19 Arabic letters.
"Over it is nineteen." 74:30
"We appointed angels to be guardians of Hell, and we assigned their number (19) (1) to disturb the disbelievers, (2) to convince the Christians and Jews (that this is a divine scripture), (3) to strengthen the faith of the faithful, (4) to remove all traces of doubt from the hearts of Christians, Jews, as well as the believers, and (5) to expose those who harbor doubt in their hearts, and the disbelievers; they will say, "What did GOD mean by this allegory?" GOD thus sends astray whomever He wills, and guides whomever He wills. None knows the soldiers of your Lord except He. This is a reminder for the people." 74:31
"Absolutely, we have revealed the reminder, and, absolutely, we will preserve it." 15:9
"Why do they not study the Quran carefully? If it were from other than GOD, they would have found in it numerous contradictions." 4:82
Quran quotations from The Final Testament, Authorized English Version. "You shall not accept any information, unless you verify it for yourself." 17:36