Which bible verse says stand firm?

A few thoughts:

There are several scriptures that say this, though different translations often use different Wording(stand fast/standing your ground, etc...):

*Exodus 14:13+14 recounts how Moses told the Israelites to "Stand firm and you will see the deliverance the Lord will bring you today. The Egyptians you see today you will never see again....The Lord will fight for you; you need only to be still."(NIV)

*1 Corinthians 16:13 Paul instructed the 'brothers' in Corinth to "Stay awake, stand firm in your faith, be brave, be strong."(CEB)(Philippians 4:1 NIV)

*Ephesians 6:14 Paul advised the congregation to acquire the spiritual suit of armor to keep us safe from Satan's attacks, so we can "Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness in place..."(NIV)(1 Thessalonians 3:8 NIV)(2 Thessalonians 2:15NIV)