John Gill Commentary Deuteronomy 12:26

"Only thy holy things which thou hast, and thy vows, thou shalt take, and go unto the place which Jehovah shall choose:" — Deuteronomy 12:26 (ASV)

Only your holy things which you have
Which the Targums of Onkelos and Jonathan interpret of the tithe of their holy things, and Aben Ezra of their burnt offerings and peace offerings; they seem to include all in (Deuteronomy 12:17)

and your vows you shall take, and go unto the place which the Lord
shall choose ;
so often referred to, but not named; see (Deuteronomy 12:5) .