Surah At-Taubah (The Repentance), Verse 2

فَسِیْحُوْا فِی الْاَرْضِ اَرْبَعَةَ اَشْهُرٍ وَّاعْلَمُوْۤا اَنَّكُمْ غَیْرُ مُعْجِزِی اللّٰهِ وَاَنَّ اللّٰهَ مُخْزِی الْكٰفِرِیْنَ ۟

Faseehoo fil ardi arba'ata ashhurinw wa'lamoooannakum ghairu mu'jizil laahi wa annal laaha mukhzil kaafireen

“Go ye, then, for four months, backwards and forwards, (as ye will), throughout the land, but know ye that ye cannot frustrate Allah (by your falsehood) but that Allah will cover with shame those who reject Him.”

Quran 9:2 (Yusuf Ali Translation)