  Inelastic neutron scattering experiments performed on a single crystal of the
antiferromagnetic compound Ce$_{0.87}$La$_{0.13}$Ru$_{2}$Si$_{2}$ under applied
pressures of up to 5 kbar are reported. A quantum critical point is reached at
around 2.6 kbar where long-range magnetic order disappears. The variation of
the characteristic energy scales with respect to temperature and pressure is
followed and found to saturate in the ordered phase.
