Exodus 8:21
Else, if thou wilt not let my people go, behold, I will send swarms of flies upon thee, and upon thy servants, and upon thy people, and into thy houses: and the houses of the Egyptians shall be full of swarms of flies, and also the ground whereon they are.
Cross-reference
Exodus 8:24
Parallel
Exodus 8:24 records the actual fulfillment — the LORD sent the swarms of flies as threatened.
Exodus 10:6
Parallel
Exodus 10:6 describes locusts filling houses, mirroring the same invasion imagery as the swarms here.
Psalm 78:45
Allusion
Psalm 78:45 recalls the plague of flies sent among the Egyptians — a historical reflection on this same event.
Psalm 105:31
Allusion
Psalm 105:31 also recounts the swarms of flies that came at God's command — a poetic retelling of this plague.
Isaiah 7:18
Allusion
Isaiah 7:18 depicts the Lord summoning flies from Egypt as agents of judgment — a later prophetic image echoing the plague of flies.