On the internal blocks, what was used to make the pyramid in ancient Egypt tight?

Ancient Egyptians cut stone into rough blocks by hammering grooves into natural stone faces

Explanation:

inserting wooden wedges, then soaking these with water. There have been varying scientific and alternative theories about the Great Pyramid's construction techniques. Most accepted construction hypotheses are based on the idea that it was built by moving huge stones from quarry and dragged lifted lifted them to places.