possession
se.gul.lah denotes a valued belonging, especially a people claimed by the LORD as his own, and also personal treasure.
The term most often identifies a people chosen and claimed as the LORD's own valued belonging; the same noun also occurs for an individual's gold, silver, and royal treasure. The contrast in the supplied verses is between a people designated for the LORD and material valuables gathered or given by a person.
Senses in use
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A people claimed as the LORD's own · dominant
In Deuteronomy 7:6, Deuteronomy 14:2, and Deuteronomy 26:18, the noun occurs where the LORD chooses or declares Israel to be a people for himself. Exodus 19:5 places this designation in the covenant condition, while Psalm 135:4 again joins the LORD's choice of Jacob and Israel with belonging to him; in Malachi 3:17 the APB renders the clause "They shall be mine."
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Personal valuables and treasure · occasional
In 1 Chronicles 29:3, the absolute noun appears in David's statement that he gave his own gold and silver to the house of God; the APB renders this as "my own possession." In Ecclesiastes 2:8, the construct form occurs in the list of silver, gold, and "the treasure of kings and provinces" that the speaker gathered.
In the Anselm Project Bible: The APB uses "possession," "own possession," and "treasured possession" in the people-designation and David's gift, while Ecclesiastes 2:8 has "the treasure of kings and provinces." These are verse-level renderings.