Thomas Hobbes,
De Cive — Chapter III: Of the other Lawes of Nature
“ By the foregoing Law we are forbidden to assume more Right by nature to our selves, then we grant to others. We may take lesse if we will, for that sometimes is an argument of modesty. But if at any time matter of Right be to be divided by us unto others, we are forbidden by this Law to favour one more or lesse then another. For he that by favouring one before another, observes not this naturall equality, reproaches him whom he thus undervalues: but it is declared above, that a reproach is against the Lawes of Nature. The observance of this Precept is called EQUITY ”
