Jesus's answer shows that he would not turn the stone into bread. Alternate translation: "Jesus replied, 'I will not do that because it is written ... alone."'"
The word "bread" refers to food in general. Food is not enough to keep people alive; people need God. Jesus quotes this scripture to tell why he would not turn the stone into bread. Alternate translation: "People cannot live on just bread" or "It is not just food that makes a person live"