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.
the children
ben  (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
of Israel
Yisra'el  (yis-raw-ale')
he will rule as God; Jisrael, a symbolical name of Jacob; also (typically) of his posterity: --Israel.
and say
'amar  (aw-mar')
to say (used with great latitude)
unto them My offering
qorban  (kor-bawn')
something brought near the altar, i.e. a sacrificial present -- oblation, that is offered, offering.
and my bread
lechem  (lekh'-em)
food (for man or beast), especially bread, or grain (for making it) -- (shew-)bread, eat, food, fruit, loaf, meat, victuals.
for my sacrifices made by fire
'ishshah  (ish-shaw')
a burnt-offering; but occasionally of any sacrifice -- (offering, sacrifice), (made) by fire.
for a sweet
nichowach  (nee-kho'-akh)
restful, i.e. pleasant; abstractly, delight -- sweet (odour).
reyach  (ray'-akh)
odor (as if blown) -- savour, scent, smell.
unto me shall ye observe
shamar  (shaw-mar')
to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.
to offer
qarab  (kaw-rab')
to approach (causatively, bring near) for whatever purpose
unto me in their due season
mow`ed  (mo-ade')
appointed (sign, time), (place of, solemn) assembly, congregation, (set, solemn) feast, (appointed, due) season, solemn(-ity), synogogue, (set) time (appointed).