Be any density liquid d in any container.
We chose two arbitrary points R and T.
The pressures on Q and R are:
The difference between the pressures of the two points is:
"The difference between the two point pressures of an equilibrium fluid is equal to the product between the fluid density, the acceleration of gravity and the difference between the depths of the points."
Through this theorem we can conclude that all points at the same depth in a homogeneous fluid (which always have the same density) are subjected to the same pressure.