Raspbian Jesse changed the way a static IP Address is configured. The static IP settings are now held in a file located in the /etc directory called dhcpcd.conf

To edit the dhcpcd.conf file, enter:
sudo /etc/dhcpcd.conf

At the end of the file add the following lines (with your own IP Address values)

eth0
static ip_address=192.168.1.14/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.4

Save and reboot.