Exodus 8:29
And Moses said, Behold, I go out from thee, and I will intreat the Lord that the swarms of flies may depart from Pharaoh, from his servants, and from his people, to morrow: but let not Pharaoh deal deceitfully any more in not letting the people go to sacrifice to the Lord.
Cross-reference
Exodus 8:8 shows Pharaoh first asking Moses to plead for frogs—the same request for intercession that Moses now agrees to for flies.
Exodus 8:15 shows Pharaoh hardening his heart after relief from frogs—exactly the deceit Moses warns against here.
Exodus 8:28 records Pharaoh's promise to let Israel go — the very deceit Moses warns about in verse 29, setting up the tension.
Exodus 10:18 shows Moses again praying to remove a plague after Pharaoh's plea — repeating the intercession pattern seen here.
Psalm 78:34-37 recounts Israel's pattern: when punished they sought God but then lied with their tongues — exactly Pharaoh's false repentance and deceit here.
Jeremiah 42:20 rebukes people who asked for prayer but then disobeyed — mirroring Pharaoh asking Moses to pray while planning to break his promise.
Jeremiah 42:21 continues: they did not obey after hearing — same dynamic as Pharaoh hearing Moses' warning yet failing to keep his word.
Like Moses promising to pray for Pharaoh, Jeremiah promises to pray for the remnant. Both prophets commit to intercession before acting.