Christ's presence during proclamation of Scripture

In reading previous articles regarding enthronement of the Gospel, Father McNamara said,

By doing so the Church shows its veneration toward God’s Word and its belief that Christ is present and speaking in a special way during the liturgical proclamation of the sacred texts. However, as Pope Paul VI taught, while Christ’s presence in the Word is real, it ceases when the readings are concluded. The Eucharistic presence alone is substantial and real ‘in the fullest sense.’
It is therefore quite logical that all liturgical honors paid toward the Book of the Gospels cease once the Liturgy of the Eucharist begins.

I try to find the reference with no avail. Documents such as “Mysterium Fidei” of Pope Paul VI, does talk about several ways Christ presence can be manifested, but did not say that it is constrained during proclamation of the Scriptures and ceases when the proclamation finish.

Of course the book of Gospel is a sacramental, but I do understand that the mode of Christ presence during Scripture proclamation in the liturgy is unique.

Anyone know references, articles, quotation that explicitly said the cessation of Christ presence when the reading conclude?

Through the same tradition the Church’s full canon of the sacred books is known, and the sacred writings themselves are more profoundly understood and unceasingly made active in her; and thus God, who spoke of old, **uninterruptedly converses *with the bride ***of His beloved Son; and the Holy Spirit, through whom the living voice of the Gospel resounds in the Church, and through her, in the world, leads unto all truth those who believe and makes the word of Christ dwell abundantly in them (see Col. 3:16).

vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19651118_dei-verbum_en.html

Christ is prefigured in the Old Testament readings. In the Gospel readings, they directly quote the Word that Jesus spoke.

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