Surah Al-Isra, ayah 81: "And say, "Truth has come, and falsehood has departed. Indeed is falsehood, [by nature], ever bound to depart."" Read it in Arabic with transliteration and the Sahih International translation, with the ayah before and after it, and listen to it recited.
وَقُل رَّبِّ أَدْخِلْنِى مُدْخَلَ صِدْقٍۢ وَأَخْرِجْنِى مُخْرَجَ صِدْقٍۢ وَٱجْعَل لِّى مِن لَّدُنكَ سُلْطَٰنًۭا نَّصِيرًۭا ﴿٨٠﴾
Wa qur Rabbi adkhilnee mudkhala sidqinw wa akhrijnee mukhraja sidqinw waj'al lee milladunka sultaanan naseeraa
And say, "My Lord, cause me to enter a sound entrance and to exit a sound exit and grant me from Yourself a supporting authority."
وَقُلْ جَآءَ ٱلْحَقُّ وَزَهَقَ ٱلْبَٰطِلُ ۚ إِنَّ ٱلْبَٰطِلَ كَانَ زَهُوقًۭا ﴿٨١﴾
Wa qul jaaa'al haqqu wa zahaqal baatil; innal baatila kaana zahooqaa
And say, "Truth has come, and falsehood has departed. Indeed is falsehood, [by nature], ever bound to depart."
وَنُنَزِّلُ مِنَ ٱلْقُرْءَانِ مَا هُوَ شِفَآءٌۭ وَرَحْمَةٌۭ لِّلْمُؤْمِنِينَ ۙ وَلَا يَزِيدُ ٱلظَّٰلِمِينَ إِلَّا خَسَارًۭا ﴿٨٢﴾
Wa nunazzilu minal quraani maa huwa shifaaa'unw wa rahmatul lilmu'mineena wa laa yazeeduz zaalimeena illaa khasaaraa
And We send down of the Qur'an that which is healing and mercy for the believers, but it does not increase the wrongdoers except in loss.
Arabic: Tanzil, Uthmani script. English: Sahih International. Audio: EveryAyah. Transliteration is a learning aid; read from the Arabic when you can.
Meaning and lessons
Allah tells the Prophet ﷺ to say: the truth has come and falsehood has vanished; falsehood is bound to vanish. Ibn Kathir reports from Abdullah ibn Masud that when the Prophet ﷺ entered Makkah on the day of the conquest, there were 360 idols around the Kaaba, and he struck them with a stick in his hand, reciting this ayah (Sahih al-Bukhari and Sahih Muslim).
The ayah is a promise as much as a description: falsehood may look strong for a time, but it has no root and does not last. Ibn Kathir adds that the truth here is the Quran, faith and beneficial knowledge that came from Allah.
Summarised in our own words from Tafsir Ibn Kathir, on Quran 17:81. Translation of the ayah: Sahih International.
Ayah 81 of Surah Al-Isra (الإِسۡرَاءِ), "The Night Journey", surah 17 of the Quran, a Meccan surah of 111 ayat revealed in Makkah. It is in juz 15 (para 15), hizb 29, on page 290 of the standard Madinah mushaf. People search for it as 17/81, 17 81 or Quran 17 81.
More verses on this theme: Quran verses about hardship and ease.
Questions
And say, "Truth has come, and falsehood has departed. Indeed is falsehood, [by nature], ever bound to depart." (Sahih International)
Allah tells the Prophet ﷺ to say: the truth has come and falsehood has vanished; falsehood is bound to vanish. Ibn Kathir reports from Abdullah ibn Masud that when the Prophet ﷺ entered Makkah on the day of the conquest, there were 360 idols around the Kaaba, and he struck them with a stick in his hand, reciting this ayah (Sahih al-Bukhari and Sahih Muslim).
It is in Surah Al-Isra, surah 17 of the Quran, in juz 15 (para 15), on page 290 of the Madinah mushaf.
The ayah before, 17:80, says: "And say, "My Lord, cause me to enter a sound entrance and to exit a sound exit and grant me from Yourself a supporting authority."" The ayah after, 17:82, says: "And We send down of the Qur'an that which is healing and mercy for the believers, but it does not increase the wrongdoers except in loss."