Charles Spurgeon Commentary John 7:39

"But this spake he of the Spirit, which they that believed on him were to receive: for the Spirit was not yet [given]; because Jesus was not yet glorified." — John 7:39 (ASV)

(But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)

He was not given then; but later, on the day of Pentecost, he was given, and he has never been withdrawn.