3 It was for this reason, too, that immediately after Adam had transgressed, as the Scripture relates, He pronounced no curse against Adam personally, but against the ground, in reference to his works, as a certain person among the ancients has observed: “God did indeed transfer the curse to the earth, that it might not remain in man.” But man received, as the punishment of his transgression, the toilsome task of tilling the earth, and to eat bread in the sweat of his face, and to return to the dust from whence he was taken. Similarly also did the woman [receive] toil, and labour, and groans, and the pangs of parturition, and a state of subjection, that is, that she should serve her husband; so that they should neither perish altogether when cursed by God, nor, by remaining unreprimanded, should be led to despise God. But the curse in all its fullness fell upon the serpent, which had beguiled them. “And God,” it is declared, “said to the serpent: Because you have done this, cursed are you above all cattle, and above all the beasts of the earth.” And this same thing does the Lord also say in the Gospel, to those who are found upon the left hand: “Depart from me, you cursed, into everlasting fire, which my Father has prepared for the devil and his angels;” indicating that eternal fire was not originally prepared for man, but for him who beguiled man, and caused him to offend— for him, I say, who is chief of the apostasy, and for those angels who became apostates along with him; which [fire], indeed, they too shall justly feel, who, like him, persevere in works of wickedness, without repentance, and without retracing their steps.
4. [These act] as Cain [did, who], when he was counselled by God to keep quiet, because he had not made an equitable division of that share to which his brother was entitled, but with envy and malice thought that he could domineer over him, not only did not acquiesce, but even added sin to sin, indicating his state of mind by his action. For what he had planned, that did he also put in practice: he tyrannized over and slew him; God subjecting the just to the unjust, that the former might be proved as the just one by the things which he suffered, and the latter detected as the unjust by those which he perpetrated. And he was not softened even by this, nor did he stop short with that evil deed; but being asked where his brother was, he said, “I know not; am I my brother's keeper?” extending and aggravating [his] wickedness by his answer. For if it is wicked to slay a brother, much worse is it thus insolently and irreverently to reply to the omniscient God as if he could battle Him. And for this he did himself bear a curse about with him, because he gratuitously brought an offering of sin, having had no reverence for God, nor being put to confusion by the act of fratricide.
Source: Adversus haereses (New Advent)