1 Kings 8:9

There was nothing in the ark except the two stone tablets that Moses had placed in it at Horeb, where the Lord had made a covenant with the Israelites after they had come out of the land of Egypt.

Note That is, Mount Sinai, or possibly a mountain in the range containing Mount Sinai

BSB · Berean Standard Bible
There was nothing in the ark save the two tables of stone, which Moses put there at Horeb, when the Lord made a covenant with the children of Israel, when they came out of the land of Egypt.

Note when the: or, where the

KJV · King James Version
There was nothing in the ark except the two stone tablets which Moses put there at Horeb, when the Lord made a covenant with the children of Israel, when they came out of the land of Egypt.
WEB · World English Bible
There was nothing in the ark save the two tables of stone which Moses put there at Horeb, when Jehovah made a covenant with the children of Israel, when they came out of the land of Egypt.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

nothing
Exodus 25:21; Deuteronomy 10:2; 2 Chronicles 5:10
in the ark
Exodus 16:33; Numbers 17:10; Hebrews 9:4
put there at Horeb
Exodus 25:21; Exodus 40:20; Deuteronomy 10:2, 5; Deuteronomy 31:26
when
or, where.
1 Kings 8:21; Exodus 24:8; Exodus 34:27, 28; Deuteronomy 4:13
the cloud
Exodus 13:21; Exodus 14:24; Exodus 16:10; Exodus 24:16–18; Exodus 40:34, 35; Leviticus 16:2; Numbers 9:15; 2 Chronicles 5:13, 14; 2 Chronicles 7:1–3; Ezekiel 10:4; Revelation 15:8