Thou hast commanded
tsavah (tsaw-vaw')
(intensively) to constitute, enjoin -- appoint, (for-)bid, (give a) charge, (give a, give in, send with) command(-er, -ment), send a messenger, put, (set) in order.
us to keep
shamar (shaw-mar')
to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.
thy precepts
piqquwd (pik-kood')
appointed, i.e. a mandate (of God; plural only, collectively, for the Law) -- commandment, precept, statute.
diligently
m`od (meh-ode')
vehemence, i.e. (with or without preposition) vehemently; by implication, wholly, speedily, etc.