Vous avez cherché: who first comes, first is served (Anglais - Latin)

who comes first
venit primus

duty comes first
primum officium

family comes first
familia, primum

justice is served
justice is served

he who first kiss will win
matri qui dederit princeps oscula

whoever moves first is gay
whoever moves first is gay

first is that no one has asked
casta est quam namo rogavit

i come first
ego diligo vos meus filia

the first is not given and the last is dispensed
prima non datur et ultima dispensatur

hysterologia, hysterologiae hysteron proteron, preposterous rhetorical figure, last phrase comes first;
hysterologia

safety of the people come first
salus populi

that we should be to the praise of his glory, who first trusted in christ.
ut simus in laudem gloriae eius qui ante speravimus in christ

moreover the profit of the earth is for all: the king himself is served by the field.
avarus non implebitur pecunia et qui amat divitias fructus non capiet ex eis et hoc ergo vanita

and they asked him, saying, why say the scribes that elias must first come?
qui respondens ait illis helias cum venerit primo restituet omnia et quomodo scriptum est in filium hominis ut multa patiatur et contemnatu

and his disciples asked him, saying, why then say the scribes that elias must first come?
et interrogaverunt eum discipuli dicentes quid ergo scribae dicunt quod heliam oporteat primum venir

but when ye shall hear of wars and commotions, be not terrified: for these things must first come to pass; but the end is not by and by.
cum autem audieritis proelia et seditiones nolite terreri oportet primum haec fieri sed non statim fini

praevenio, praevenire, praeveni, praeventus arrive/occur/come first/before/too soon; precede; surpass; anticipate/forestall;
praeveni