This is from the enormous anthology of distich poetry assembled by Barthold Nihus, Epigrammata Disticha, published in 1642; the poem is by Franciscus Sweertius.
In Epitaphia a Se Collecta
Te moneant, quaeso, tot in uno funera libro,
Tempore quod certo tu quoque funus eris.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
epitaphium (epitaphii, n.): epitaph
quaesō, quaesere: beg, beseech
ā ab abs: from, by (+abl.)
certus -a -um: sure, fixed; certē, certainly, surely
colligō -ere -lēgī -lēctum: gather together, collect
fūnus funeris n.: funeral; death; dead body
in: in, on (+ abl.); into, onto (+ acc)
liber librī m.: book
moneō monēre monuī monitum: warn, advise
qui quae quod: who, which, what / quis quid: who? what? which?
quoque: also, too
sui, sibi, sē: him- her- itself
sum, esse, fuī: be, exist
tempus -oris n.: time
tot: so many
tū tuī tibi tē: you (sing.)
ūnus -a -um: one