Revelation 22:17, "he who is thirsty, let him come. He who desires, let him take the water of life freely." - the same free invitation, echoed here as the Bible's closing offer.
“Hey! Come, everyone who thirsts, to the waters! Come, he who has no money, buy, and eat! Yes, come, buy wine and milk without money and without price.
The Spirit and the bride say, “Come!” He who hears, let him say, “Come!” He who is thirsty, let him come. He who desires, let him take the water of life freely.
This closing invitation opens the door wide - free food and drink offered to "everyone who thirsts" - closing the Servant Songs section on universal welcome rather than a narrow scope.