  We present new analysis of infrared transmission spectroscopy of the
cloud-free hot-Saturn WASP-96b performed with the Hubble and Spitzer Space
Telescopes (HST and Spitzer). The WASP-96b spectrum exhibits the absorption
feature from water in excellent agreement with synthetic spectra computed
assuming a cloud-free atmosphere. The HST-Spitzer spectrum is coupled with Very
Large Telescope (VLT) optical transmission spectroscopy which reveals the full
pressure-broadened profile of the sodium absorption feature and enables the
derivation of absolute abundances. We confirm and correct for a spectral offset
of $\Delta R_{{\rm p}}/R_{\ast}=(-4.29^{+0.31}_{-0.37})\,\times10^{-3}$ of the
VLT data relative to the HST-Spitzer spectrum. This offset can be explained by
the assumed radius for the common-mode correction of the VLT spectra, which is
a well-known feature of ground-based transmission spectroscopy. We find
evidence for a lack of chromospheric and photometric activity of the host star
which, therefore, make a negligible contribution to the offset. We measure
abundances for Na and O that are consistent with solar to supersolar, with
abundances relative to solar values of $21^{+27}_{-14}$ and $7^{+11}_{-4}$,
respectively. We complement the transmission spectrum with new thermal emission
constraints from Spitzer observations at 3.6 and $4.5\mu$m, which are best
explained by the spectrum of an atmosphere with a temperature decreasing with
altitude. A fit to the spectrum assuming an isothermal blackbody atmosphere
constrains the dayside temperature to be $T_{\rm{p}}$=$1545$$\pm$$90$K.
