The opportunity presented itself ere long. One day a sheep belonging to Abel tramped over a field that had been planted by Cain. In a rage, the latter called out, "What right hast thou to live upon my land and let thy sheep pasture yonder?" Abel retorted: "What right hast thou to use the products of my sheep, to make garments for thyself from their wool? If thou wilt take off the wool of my sheep wherein thou art arrayed, and wilt pay me for the flesh of the flocks which thou hast eaten, then I will quit thy land as thou desirest, and fly into the air, if I can do it." Cain thereupon said, "And if I were to kill thee, who is there to demand thy blood of me?" Abel replied: "God, who brought us into the world, will avenge me. He will require my blood at thine hand, if thou shouldst slay me. God is the Judge, who will visit their wicked deeds upon the wicked, and their evil deeds upon the evil. Shouldst thou slay me, God will know thy secret, and He will deal out punishment unto thee." These words but added to the anger of Cain, and he threw himself upon his brother.[18] Abel was stronger than he, and he would have got the worst of it, but at the last moment he begged for mercy, and the gentle Abel released his hold upon him. Scarcely did he feel himself free, when he turned against Abel once more, and slew him. So true is the saying, "Do the evil no good, lest evil fall upon thee."[19] THE PUNISHMENT OF CAIN The manner of Abel's death was the most cruel conceivable. Not knowing what injury was fatal, Cain pelted all parts of his body with stones, until one struck him on the neck and inflicted death. After committing the murder, Cain resolved to flee, saying, "My parents will demand account of me concerning Abel, for there is no other human being on earth." This thought had but passed through his mind when God appeared unto him, and addressed him in these words: "Before thy parents thou canst flee, but canst thou go out from My presence, too? 'Can any hide himself in secret places that I shall not see him?' Alas for Abel that he showed thee mercy, and refrained from killing thee, when he had thee in his power! Alas that he granted thee the opportunity of slaying him!" Questioned by God, "Where is Abel thy brother?" Cain answered: "Am I my brother's keeper? Thou art He who holdest watch over all creatures, and yet Thou demandest account of me! True, I slew him, but Thou didst create the evil inclination in me. Thou guardest all things; why, then, didst Thou permit me to slay him? Thou didst Thyself slay him, for hadst Thou looked with a favorable countenance toward my offering as toward his, I had had no reason for envying him, and I had not slain him." But God said, "The voice of thy brother's blood issuing from his many wounds crieth out against thee,[20] and likewise the blood of all the pious who might have sprung from the loins of Abel."