The following is an excerpt from volume 4 of The Christian’s Reasonable Service by Wilhelmus à Brakel (hardcopy).
The Future Conversion of the Jews Examined in Light of Matthew 23:38-39
Proof #3: This proof is derived from Matt 23:38-39: “Behold, your house is left unto you desolate. For I say unto you, Ye shall not see Me henceforth, till ye shall say, Blessed is He that cometh in the Name of the Lord.” Here we have a prophecy concerning the destruction of Jerusalem (vs. 38), followed by Christ being hidden from them. This is the blindness of Israel of which we have spoken in light of Rom 11. Here we have the designation of a time frame: “till ye shall say, Blessed is He that cometh.” There will come a day that they will say, “Blessed is He that cometh”; “There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob” (Rom 11:26). Until then they will neither see, know, nor acknowledge Jesus—however, no longer than that. Christ will then come again to His old people Israel and they will then be turned again.
“And they shall fall by the edge of the sword, and shall be led away captive into all nations: and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled” (Luke 21:24). The Lord Jesus prophesied of the eradication of the Jewish nation and of the subsequent dispersion of the Jews among all the nations, as well as the long duration of the desolation of Jerusalem, designating the time when this dispersion and desolation would end as being when the times of the Gentiles will be fulfilled. This is identical to what the apostle says: “For I would not, brethren, that ye should be ignorant of this mystery … that blindness in part is happened to Israel, until the fulness of the Gentiles be come in” (Rom 11:25). The word “until” does not imply “never,” but rather a certain moment; that is, after that time, when the fullness of the Gentiles shall have come in. Then will Israel no longer remain blind, and then Israel will repent, as is stated expressly in verse 26: “And so all Israel shall be saved.” The partial conversion during the time of the apostles is not the global conversion of Israel, but that of a small remnant. However, the blinded part of Israel would also be converted when the fullness of the Gentiles will have come in, and thus will all Israel be saved. If, therefore, their dispersion and the treading down of Jerusalem will last until the times of the Gentiles will have been fulfilled, there will most certainly be a restoration of the nation, not only in a spiritual sense, but also in a physical sense. This we shall now consider.
Wilhelmus à Brakel, The Christian’s Reasonable Service, Vol. 4, pp. 525-526