How to disable haptic feedback for (software) keyboard?

On my Samsung Galaxy SIII, when the screen is unlocked, by default when the user presses any of the hardware keys Menu (the key on the left) or Back (the key on the right) the phone virates slightly and then if the user keeps holding such buttons then the phone emits another slight vibration corresponding to the long press, and the same happens when the user long-presses the Home hardware key (the key in the middle). Since I didn't like this bahavior I went to Settings -> My device -> Power saving mode (turned it on) -> Turn off haptic feedback (made sure this checkbox was checked). This disabled the slight vibration occurring when the above-mentioned hardware buttons are pressed, but the phone still vibrates slightly when the buttons on the software keyboard are pressed. Is there a way to disable haptic feedback for the software keybaord as well? Thanks.