Ephesians 4:9

Now that he ascended
These words are a conclusion of Christ's descent from heaven, from his ascension thither; for had he not first descended from thence, it could not have been said of him that he ascended; for no man hath ascended to heaven but he that came down from heaven, ( John 3:13 ) and they are also an explanation of the sense of the psalmist in the above citation, which takes in his humiliation as well as his exaltation; which humiliation is signified by his descent into the earth:

what is it but that he also descended first into the lower parts of
the earth?
this the Papists understand of his decent into a place they call Limbus Patrum, which they make to be contiguous to hell; and where they say the patriarchs were detained till Christ's coming; and that he went thither to deliver them out of it; and that these are the captivity he led captive; all which is fictitious and fabulous: for certain it is, that the place where Abraham was with Lazarus in his bosom was not near to hell, but afar off, and that there was a great gulf between them, ( Luke 16:23 Luke 16:26 ) and the spirits or souls of the patriarchs returned to God that gave them, when separated from their bodies, as the souls of men do now, ( Ecclesiastes 12:7 ) nor did Christ enter any such feigned place at his death, but went to paradise, where the penitent thief was that day with him; nor were the patriarchs, but the principalities and powers Christ spoiled, the captivity he led captive and triumphed over: some interpret this of Christ's descent into hell, which must be understood not locally, but of his enduring the wrath of God for sin, which was equivalent to the torments of hell, and of his being in the state of the dead; but it may rather design the whole of his humiliation, as his descent from heaven and incarnation in the virgin's womb, where his human nature was curiously wrought in the lowest parts of the earth; and his humbling himself and becoming obedient unto death, even the death of the cross, when he was made sin and a curse for his people, and bore all the punishment due to their transgressions; and his being in Hades, in the state of the dead, in the grave, in the heart of the earth, as Jonah in the whale's belly: reference seems to be had to ( Psalms 139:15 ) where "the lower parts of the earth", is interpreted by the Targum on the place of (amad aoyrk) , "his mother's womb"; and so it is by Jarchi, Aben Ezra, Kimchi, and Ben Melec. The Alexandrian copy and the Ethiopic version leave out the word "first" in this clause.