O Messenger , let them not grieve thee that vie with one another in unbelief , such men as say with their mouths ' We believe ' but their hearts believe not ; and the Jews who listen to falsehood , listen to other folk , who have not come to thee , perverting words from their meanings , saying , ' If you are given this , then take it ; if you are not given it , beware ! ' Whomsoever God desires to try , thou canst not avail him anything with God .