Psalm 27:3 expresses fearless confidence even when war arises — directly supporting the command here not to be alarmed.

Psalm 112:7 says the righteous are not afraid of bad news — directly applicable to the command not to be alarmed by wars.

Jeremiah 51:46 directly parallels the command: do not be afraid when rumors of war are heard, just as Mark says.

Matthew 24:6 is the synoptic parallel, nearly identical: 'See that you are not alarmed, for this must take place.'

Luke 21:9-11 is the synoptic parallel, repeating the command and adding details about earthquakes and plagues.

2 Thess 2:2 warns against being shaken by claims the Day has come, echoing Jesus' 'do not be troubled'—same pastoral warning about end-times deception.

Psalm 46:1-3 affirms that God is our refuge, so we need not fear even catastrophic upheaval — similar calm in crisis.

Proverbs 3:25 counsels against fearing sudden terror — a general wisdom parallel to not being alarmed by wars.