Relieved as they were of all the cares of subsistence through the gift of manna, it was plainly the duty of the Israelites to devote themselves exclusively to the study of the Torah. [119] When, therefore, they slackened in the performance of this duty, punishment in the form of lack of water immediately overtook them. This was the first time that they actually experienced this want, for at Marah nothing more than alarm that this need might come upon them, had caused them to murmur and complain. In their distress they once more unreasonably cast reproaches upon their leader, and disputed with him, saying: "Wherefore is this, children, that thou hast brought us up out of Egypt, to kill us, and our children, and our cattle with thirst?" Moses replied: "As often as you quarrel with me, you tempt God, but God performeth wonders and excellent deeds for you, as often as you dispute with me, that His name may sound in glory throughout the world." In spite of the injury they had done him, Moses prayed to God that He might aid them in their distress and also stand by him. "O Lord of the world!" said he, "I am surely doomed to die. Thou biddest me not to be offended with them, but if I obey Thy words, I shall certainly be killed by them." God, however, replied: "Try thou to act like Me; as I return good for evil, so do thou return to them good for evil, and forgive their trespass; go on before the people, and We shall see who dares touch thee." [120] Hardly had Moses shown himself to the people, when all of them rose reverently from their seats, whereupon God said to Moses: "How often have I told thee not to be angry with them, but to lead them, as a shepherd leads his flock; it is for their sake that I have set thee on this height, and only for their sake wilt thou find grace, goodwill, and mercy in My sight." [121] Then God bade him go with some elders to the rock on Horeb, and fetch water out of it. The elders were to accompany him there, that they might be convinced that he was not bringing water from a well, but smiting it from a rock. To accomplish this miracle, God bade him smite the rock with his rod, as the people labored under the impression that this rod could only bring destruction, for through its agency Moses had brought the ten plagues upon the Egyptians in Egypt, and at the Red Sea; now they were to see that it could work good also. [122] Upon God's bidding, Moses told the people to choose from which rock they wished water to flow, [123] and hardly had Moses touched with his sapphire rod the rock which they had chosen, when plenteous water flowed from it. The spot where this occurred, God called Massah, and Meribah, because Israel had there tried their God, saying, "If God is Lord over all, as over us; if He satisfies our needs, and will further show us that He knows our thoughts, then will we serve Him, but not otherwise." [124]