10 But He who remits by man, can also remit even without man. For He who is able to give by another, has no less the power to give by Himself. To some He gave by the ministry of John. By whom did He give to John himself? With good reason, as God wished to show this, and to attest this truth, when certain in Samaria had had the Gospel preached to them, and had been baptized, and baptized by Philip the Evangelist, one of the seven deacons that were first chosen, they did not receive the Holy Ghost, though they had been baptized.
Tidings were brought to the disciples who were at Jerusalem, and they came to Samaria, in order that they who had been baptized, might by imposition of their hands receive the Holy Ghost. And so it was; “They came and laid their hands on them, and they received the Holy Ghost.” For the Holy Ghost was at that time given in such sort, that He even visibly showed Himself to have been given. For they who received Him spoke with the tongues of all nations; to signify that the Church among the nations was to speak in the tongues of all.
So then they received the Holy Ghost, and He appeared evidently to be in them. Which when Simon saw, supposing that this power was of men, he wished it might be his also. What he thought to be of men, he wished to buy of men. “How much money,” says he, “will you take of me, that by imposition of my hands the Holy Ghost may be given?” Then Peter says to him with execration, You have neither part nor lot in this faith. For you have thought that the gift of God may be purchased with money. Your money perish with you; and the rest which he spoke in the same place suitably to the occasion.
Source: Sermons on Selected Lessons of the New Testament (New Advent)