Exodus 24:18
And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights.
Cross-reference
Exodus 24:17 describes the consuming fire that Moses entered in the cloud — the same theophanic presence.
In Exodus 24:12, God commands Moses to come up for the tablets — the direct cause of the 40-day stay in verse 18.
Exodus 34:28 records another 40-day fast on Sinai — directly parallel to Moses' first 40 days here.
In Exodus 31:18, God gives the tablets after the 40 days — the outcome of the event in 24:18.
Exodus 32:1 shows the people's impatience after Moses' forty-day absence, directly leading to the golden calf sin.
Exodus 32:15 describes Moses descending with the tablets after the forty days, completing the mountaintop sojourn.
Exodus 19:20 records an earlier ascent of Moses up Sinai — similar pattern of divine summons and going up.
Deuteronomy 9:9 recounts the same event — Moses on Sinai 40 days receiving the law — a direct reference.
In Deuteronomy 10:10, Moses explicitly mentions a second 40-day stay 'as the first time' — directly paralleling Exodus 24:18.
In 1 Kings 19:8, Elijah travels 40 days to Horeb, mirroring Moses' 40 days on Sinai — a typological pattern.
In Matthew 4:2, Jesus fasts 40 days and nights in the wilderness, paralleling Moses' fast on Sinai — a new Moses typology.
In Mark 1:13, Jesus is tempted for 40 days in the wilderness, echoing Moses' 40 days on the mountain.
In Luke 4:2, Jesus is tempted for 40 days, similarly connecting to Moses' 40-day fast on Sinai.
Deuteronomy 4:13 recalls the covenant and tablets given at Sinai, which Moses received during those forty days.
Deuteronomy 9:18 describes another 40-day fast of intercession after the golden calf — similar duration and self-denial.
In Deuteronomy 9:25, Moses recounts another 40-day intercession on the mountain — same duration, different occasion.