This is one of the riddles collected by Nikolaus Reusner, which you can read online at the University of Mannheim.
Aenigma: Deus
Principium cunctis, cunctis do denique finem;
Ipse ego fine simul principioque carens.
The vocabulary is keyed to the DCC Latin Vocabulary list. There is only one word in this poem that is not on the DCC list:
aenigma (aenigmatis, n.): riddle, enigma
careō -ēre -uī: lack (+ abl.)
cūnctus -a -um: entire all together
dēnique: finally
deus -ī m.; dea -ae f. god; goddess
dō dare dedī datum: give
ego meī mihi mē: I, me
fīnis -is m.: end, boundary
ipse ipsa ipsum: him- her- itself
principium -iī n.: beginning
que (enclitic) - and
simul: at the same time
