מדרש על במדבר 4:49

2) The limitations: (Bamidbar 7:89): "And when Moses came to the ohel moed (for the L–rd) to speak to 1 him, that he heard the voice speaking to 2 him … and He spoke to him." (Shemoth 25:22): "And I will be appointed for you there, and I will speak to you … all that I will charge you with to the children of Israel." (Shemoth 29:42): "… where I shall appoint a time for you (plural) to speak to you (singular) there." (Shemoth 30:6):