Quran 2:198

لَيۡسَ عَلَيۡڪُمۡ جُنَاحٌ أَن تَبۡتَغُواْ فَضۡلاً۬ مِّن رَبِّڪُمۡ‌ۚ فَإِذَآ أَفَضۡتُم مِّنۡ عَرَفَـٰتٍ۬ فَٱذۡڪُرُواْ ٱللَّهَ عِندَ ٱلۡمَشۡعَرِ ٱلۡحَرَامِ‌ۖ وَٱذۡڪُرُوهُ كَمَا هَدَٮٰڪُمۡ وَإِن ڪُنتُم مِّن قَبۡلِهِۦ لَمِنَ ٱلضَّآلِّينَ ١٩٨

You commit no error by seeking provisions from your Lord (through commerce). When you file from `Arafaat, you shall commemorate ALLAH at the Sacred Location (of Muzdalifah). You shall commemorate Him for guiding you; before this, you had gone astray.