Romans 14:2
For one believeth that he may eat all things: another, who is weak, eateth herbs.
Cross-reference
Romans 14:14 clarifies the principle behind the vegetable-only practice: nothing is inherently unclean, but it becomes unclean for the person who thinks so.
1 Corinthians 10:25 instructs believers to eat meat from the market without questions — reinforcing the freedom of the 'strong' to eat anything.
1 Timothy 4:4 declares all food good and not to be rejected — directly supporting the position that one can eat anything.
Titus 1:15 states that to the pure all things are pure — providing the theological basis for the 'strong' who eat freely.
Hebrews 13:9 warns against being swayed by food rules and emphasizes grace — echoing Paul's concern about disputable matters.
1 Corinthians 8:9 warns against causing the weak to stumble over food, directly paralleling Paul's concern for the weak in Romans 14.
Colossians 2:16 forbids judgment over food and drink, mirroring the instruction not to judge the weak in Romans 14:3.
Proverbs 15:17 prefers herbs with love over meat with hatred, echoing that diet matters less than love — a key theme in Romans 14.
Daniel 1:12 shows Daniel choosing vegetables to avoid defilement, similar to the weak person's scruples in Romans 14:2.