Moses, Aaron, and Samuel Answered from the Pillar of Cloud

"They call upon the LORD, and He answers them" (Psalms 99:6). This one calls and is answered, and that one calls and is answered. "In a pillar of cloud" (Psalms 99:7). Behold, we have heard concerning Moses that He spoke with him in a pillar of cloud, as it is said, "And the LORD descended in the cloud and stood with him there" (Exodus 34:5). And concerning Aaron, He spoke with him in a cloud, as it is said, "And the LORD came down in a cloud and stood at the entrance of the Tent" (Numbers 12:5). But concerning Samuel we have not heard. And where have we heard it? From this verse: "And they answered them and said, He is (yesh) here before you" (I Samuel 9:12). Rabbi Yudan in the name of Rabbi Mari bar Yaakov: The women said to them, Do you not see a cloud bound above his courtyard? And yesh is nothing other than a cloud, as you say, "And it would be (yesh) that the cloud was" (Numbers 9:20). "And Samuel among those who call upon His name" (Psalms 99:6). We have heard concerning Moses that the Torah was written in his name, as it is said, "Remember the Torah of Moses My servant" (Malachi 3:22). And concerning Samuel, a book was written for him, as it is said, "And he wrote it in a book and laid it before the LORD" (I Samuel 10:25). But concerning Aaron we have not heard; rather it teaches that this parashah was given to him, that it should not depart from him nor from his sons, until the end of all the generations. And which is this? "This is the statute of the Torah" (Numbers 19:2).