Tertullian

“ If “righteousness” must, of course chastity must too. If, then, forasmuch as there is in the law a precept that a man is to take in marriage the wife of his brother if he have died without children, [4] for the purpose of raising up seed to his brother; and this may happen repeatedly to the same person, according to that crafty question of the Sadducees; [5] men for that reason think that frequency of marriage is permitted in other cases as well: it will be their duty to understand first the reason of the precept itself ”

“ For our one Father, God, lives, and our mother, the Church; and neither are we dead who live to God, nor do we bury our dead, inasmuch as they too are living in Christ. At all events, priests we are called by Christ ”

“ And since there are some who sometimes assert that they have nothing to do with the law (which Christ has not dissolved, but fulfilled) , [1] sometimes catch at such parts of the law as they choose; plainly do we too assert that the law has deceased in this sense, that its burdens—according to the sentence of the apostles—which not even the fathers were able to sustain, [2] have wholly ceased: such (parts) , however, as relate to righteousness not only permanently remain reserved, but even amplified ”