This is an item from Anton Moker's Decalogus metricus et paraenetica disticha, published in 1573. You can see the book at GoogleBooks.
Referenda et Tacenda
Est in eo cautae sapiens prudentia mentis,
Qui referenda refert atque tacenda tacet.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
cautus, -a, -um: cautious, careful, wary
prūdentia (prūdentiae, f.): foresight, wisdom
atque, ac: and in addition, and also, and; (after comparatives) than; simul atque, as soon as
in: in, on (+ abl.); into, onto (+ acc)
mēns mentis f.: mind
qui quae quod: who, which, what / quis quid: who? what? which?
referō -ferre -tulī -lātum: bring back; report
sapiens -ntis.: wise man
sum, esse, fuī: be, exist
taceō -ēre -uī -itum: be silent; tacitus -a -um, silent