Exodus 34:4

And he hewed two tables of stone like unto the first; and Moses rose up early in the morning, and went up unto mount Sinai, as the Lord had commanded him, and took in his hand the two tables of stone.

Cross-references

Exodus 19:20 describes Moses being summoned to the top of Sinai — a parallel to this second ascent here.

Exodus 32:16 says the first tablets were God's work — here Moses chisels them himself, showing a shift in production.

Deuteronomy 10:1 gives a parallel account of the same command to chisel tablets — reinforcing this event.

Deuteronomy 10:3 recounts Moses chiseling tablets and ascending — a direct parallel to this verse.