James 4:13
Go to now, ye that say, To day or to morrow we will go into such a city, and continue there a year, and buy and sell, and get gain:
Cross-reference
James 5:1 uses the same 'Come now' opening to address the rich with a warning of judgment—a parallel rhetorical approach.
Proverbs 27:1 directly warns against boasting about tomorrow—the OT source for James 4:13's admonition.
Luke 12:17-19 shows the rich fool planning future ease—identical presumption as the merchants in James 4:13.
Ecclesiastes 10:14 says a fool cannot know what will be — directly supporting James' warning against presuming on the future.
Lamentations 3:37 asks who can make anything happen without the Lord's command — underpinning James' 'if the Lord wills' theology.
Luke 12:18 has the rich fool planning to build bigger barns — the very attitude James condemns, with God calling him a fool that night.
In 1 Corinthians 7:29, Paul urges living with urgency because time is short — echoing James's call to depend on God's will for tomorrow.
Job 17:11 laments that his plans are broken off — echoing the uncertainty James warns against when presuming on tomorrow.
Isaiah 56:12 depicts people saying 'tomorrow will be like this day'—presumptuous planning parallel to James 4:13.