Model Filter not taking string(with quotes) value

Hi

After spending several hours to fix this and trying out several possibilities, i still cannot manage to make it work, Here is the issue

Below is the code

               path: "Property",

               operator: sap.ui.model.FilterOperator.EQ,

               value1: "Something"

          });

.../EntityName?$filter=Property eq 'Something' - This is how the string SHOULD be formed

.../EntityName?$filter=Property eq Something - This is how it IS formed(notice the missing quotes

I get the below error if if the url is not formed in the "should" way

Invalid filter expression: 'Property eq Something '

Does anyone have any suggestions to fix this?

Thanks

Jayant