This is an item from Anton Moker's Decalogus metricus et paraenetica disticha, published in 1573. You can see the book at GoogleBooks.
Laesus Semel, Prudentius
Prospicit ille sibi, timet et prudentius ignem,
Qui semel ardenti laesus ab igne fuit.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
prōspiciō, prōspicere: look ahead, watch out for
prūdenter: cautiously; prudentius, comp. adv.
ā ab abs: from, by (+abl.)
ārdeo ārdēre ārsī ārsum: blaze, glow; be eager
et: and
īgnis -is m.: fire
ille illa illud: that
laedō laedere laesī laesum: injure by striking, hurt
qui quae quod: who, which, what / quis quid: who? what? which?
semel: once
sui, sibi, sē: him- her- itself
sum, esse, fuī: be, exist
timeō -ēre -uī: to fear, to dread