Psalm 84:1 – 3 (LXX 83: 1 – 4) reads,
How lovely is your dwelling place, O Lord of hosts! My soul longs, yes, faints for the courts of the Lord; my heart and flesh sing for joy to the living God. Even the sparrow finds a home, and the swallow a nest for herself, where she may lay her young at your altars.”
Regarding the sparrow and the swallow, the Psalmist’s observation may be taken as a side observation, taken at a glance and to be dismissed by those with the more serious mind of faith. This would prove to be an error. This “off hand” verse comes from the eye of informed, mature, and loving faith.