فَسِيحُواْ فِي الأَرْضِ أَرْبَعَةَ أَشْهُرٍ وَاعْلَمُواْ أَنَّكُمْ غَيْرُ مُعْجِزِي اللّهِ وَأَنَّ اللّهَ مُخْزِي الْكَافِرِينَ
[9:2]
So go about in the land for four months and know that you cannot weaken Allah and that Allah will bring disgrace to the unbelievers.
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.
Travel freely in the land four months, and know that ye cannot escape Allah and that Allah will confound the disbelievers (in His Guidance).