This is from the Institutio Puerilis of Marc Antoni Muret (1526-1585); you can read the book at GoogleBooks. The phrase in loco parentis even has its own Wikipedia article!
Inprimis venerare Deum, venerare parentes:
Et quos ipsa loco tibi dat natura parentum.
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:
veneror, -ārī - honor, venerate, revere
deus -ī m.; dea -ae f. god; goddess
do dare dedī datum: give
et: and
in: in, on (+ abl.); into onto (+ acc)
ipse, ipsa, ipsum: him- her- itself
locus -ī m.: place; loca (n. pl.) region
nātūra -ae f.: nature
parēns -ntis m./f.: parent
prīmus -a -um: first
qui, quae, quod: who, which, what; quis quid: who? what? which?
tū tuī tibi tē: you (sing.)
