No Holy Spirit in the O. T.is a common misconception because Jesus said if he did not go away the comforter could not come.The words Holy Spirit are not found in the O. T. very often but the words Lord & God are, and the meaning is the same. For the Holy Spirit was not yet given. We know that
the Spirit is eternal; but the Evangelist declares that, so
long as Christ dwelt in the world in the form of a
servant, that grace of the Spirit, which was poured out on
men after the resurrection of Christ, had not been openly
manifested. And, indeed, he speaks comparatively, in the
same manner as when the New Testament is compared to the
Old. God promises his Spirit to his elect and believers,
as if he had never given him to the Fathers. At that
very time, the disciples had undoubtedly received the
Spirit; for where comes faith but from
the Spirit? The Evangelist, therefore, does not
affirm that the grace of the Spirit was not offered and
given to believers before the death of Christ, but
that it was not yet so bright and illustrious as it would
afterwards become. David asked God not to take the Holy Spirit from him Psalm 51:11, God said to Moses "Take Joshua, a man in whom is the Spirit" NAS bible, Numbers 27:18.. There are several others but you only have to establish a precedence once.