(Judaism) sacred chest where the ancient Hebrews kept the two tablets containing the Ten Commandments WordNet 3.0 & Open English WordNet

The Ark of the Covenant, also known as the Ark of the Testimony or the Ark of God, is an artifact believed to be the most sacred relic of the Israelites, which is described as a wooden chest, covered in pure gold, with an elaborately designed lid called the mercy seat. Wikipedia

In Judaism, a wooden chest containing the two stone tablets of the Ten Commandments Wikidata

The chest carried by the Hebrews containing the stone tablets carved with the Ten Commandments. Wiktionary

The sacred container, a gold-plated wooden chest, of the two tablets of law (the Ten Commandments) given to Moses by the Hebrew God. Wiktionary

The sacred container, a gold-plated wooden chest. Wiktionary (translation)