The text reads: Adesto, Domine, famulis tuis, et perpetuam benignitatem largire poscentibus, ut his, qui te auctore et gubernatore et cet.
The full text is: Adesto, Domine, famulis tuis, et perpetuam benignitatem largire poscentibus, ut his, qui te auctorem et gubernatorem gloriantur habere, et grata restaures, et restaurata conserves.
"Be ever with thy servants, O Lord, and grant (Your) unending kindness, so that You (may) restore (Your) gifts to those who glory in You, as (their) Creator and Ruler, and that You (may) preserve (those) having been restored."