When Moses entered the Tent of Meeting to speak with the LORD, he heard the voice speaking to him from between the two cherubim above the mercy seat on the ark of the Testimony. Thus the LORD spoke to him.
KJV
And when Moses was gone into the tabernacle of the congregation to speak with him, then he heard the voice of one speaking unto him from off the mercy seat that [was] upon the ark of testimony, from between the two cherubims: and he spake unto him.
ASV
And when Moses went into the tent of meeting to speak with him, then he heard the Voice speaking unto him from above the mercy-seat that was upon the ark of the testimony, from between the two cherubim: and he spake unto him.