  We present an approximation version of the results of D. P. Gupta [ J. of
Approx. Theory, 7 (1973), 226-238] A. N. S. Singroura [Proc. Japan Acad., 39
(4) (1963), 208-210] and G. Szeg\"{o} [Math. Z., 25 (1926), 87-115]. Some
corollaries and examples will also be given.
