Wa maa kaanal mu'minoona liyanfiroo kaaaffah; falaw laa nafara min kulli firqatim minhum taaa'ifatul liyatafaqqahoo fiddeeni wa liyunziroo qawmahum izaa raja'ooo ilaihim la'allahum yahzaroon
It was not necessary for the believers to go forth all together (to receive religious instruction), but why did not a party of them go forth that they may grow in religious understanding, and that they may warn their people when they return to them, so that they may avoid (erroneous attitudes)?
