Allah says:

[وَقُلْ جَآءَ الْحَقُّ وَزَهَقَ الْبَـطِلُ]

(And say: "Truth has come and falsehood has vanished...'') This is a threat and a warning to the disbelievers of the Quraysh, for there has come to them from Allah the truth of which there can be no doubt and which they have no power to resist. This is what Allah has sent to them of the Qur'an, faith and beneficial knowledge. Their falsehood has perished or vanished and been destroyed, it cannot remain or stand firm in the face of the truth.

[بَلْ نَقْذِفُ بِالْحَقِّ عَلَى الْبَـطِلِ فَيَدْمَغُهُ فَإِذَا هُوَ زَاهِقٌ]

Nay, We fling the truth against the falsehood, so it destroys it, and behold, it dis- appears. Al-Bukhari recorded that `Abdullah bin Mas`ud said: The Prophet entered Makkah (at the Con- quest), and around the House (the Ka`bah) were three hundred and sixty idols. He started to strike them with a stick in his hand, saying,

[جَآءَ الْحَقُّ وَزَهَقَ الْبَـطِلُ إِنَّ الْبَـطِلَ كَانَ زَهُوقًا]

(Truth has come and falsehood has vanished. Surely falsehood is ever bound to vanish.) [17:81]

[جَآءَ الْحَقُّ وَمَا يُبْدِىءُ الْبَـطِلُ وَمَا يُعِيدُ]

(Truth has come, and falsehood can neither create anything nor resurrect (anything).) [34:49]

[وَنُنَزِّلُ مِنَ الْقُرْءَانِ مَا هُوَ شِفَآءٌ وَرَحْمَةٌ لِّلْمُؤْمِنِينَ وَلاَ يَزِيدُ الظَّـلِمِينَ إَلاَّ خَسَارًا ]

(82. And We send down of the Qur'an that which is a cure and a mercy to the believers, and it increases the wrongdoers in nothing but loss.)