This is an item from Anton Moker's Decalogus metricus et paraenetica disticha, published in 1573. You can see the book at GoogleBooks.
Finis Respiciendus
Non festinandum nimis est, sed finis in omni
Prudenter facto respiciendus erit.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
festīnō, festīnāre: hasten, hurry, be quick
prūdenter: wisely, cautiously, carefully
faciō facere fēcī factum: do, make
fīnis -is m.: end, boundary
in: in, on (+ abl.); into, onto (+ acc)
nimius -a -um: too much, excessive; nimis or nimium: excessively
nōn: not
omnis -e: all, every, as a whole
respicio -ere -spēxi -spectum: look back, regard, consider
sed: but