Reference

1 Kings 8:61

Let your heart therefore be perfect with the Lord our God, to walk in his statutes, and to keep his commandments, as at this day.
59

And let these my words, wherewith I have made supplication before the Lord, be nigh unto the Lord our God day and night, that he maintain the cause of his servant, and the cause of his people Israel at all times, as the matter shall require:

60

That all the people of the earth may know that the Lord is God, and that there is none else.

61

Let your heart therefore be perfect with the Lord our God, to walk in his statutes, and to keep his commandments, as at this day.

62

And the king, and all Israel with him, offered sacrifice before the Lord.

63

And Solomon offered a sacrifice of peace offerings, which he offered unto the Lord, two and twenty thousand oxen, and an hundred and twenty thousand sheep. So the king and all the children of Israel dedicated the house of the Lord.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Present with the Lord

The verse speaks of a present state of being "perfect with the Lord our God" in terms of obedience to statutes and commandments, not a future state of being with the Lord immediately at or after death. The phrase "as at this day" further emphasizes a present, ongoing commitment rather than a post-mortem condition.