Ezekiel 20:1

¹ And it came to pass in the seventh year, in the fifth month, the tenth day of the month, that certain of the elders of Israel came to inquire of the LORD, and sat before me.

Sparrow and swallow

In Psalm 84:3, 'a sparrow' signifies spiritual truth, and 'a swallow' signifies natural truth from which worship is performed.