1 Timothy 1:6
From which some having swerved have turned aside unto vain jangling;
Cross-reference
In 1 Timothy 5:15, some widows have also 'turned aside' — here to follow Satan — showing a pattern of deviation from the faith.
In 1 Timothy 6:4, those who stray are described as conceited and obsessed with controversies — the fruitless discussion mentioned here.
In 1 Timothy 6:5, the same false teachers cause constant friction and are deprived of the truth — a result of their straying.
In 1 Timothy 6:20, Paul warns Timothy to avoid 'worldly and empty chatter' — directly echoing the fruitless discussion here.
1 Timothy 6:21 uses the same Greek word 'swerved' for departing from the faith, matching the swerving into vain discussion here.
In 1 Timothy 6:3, those who teach different doctrine are the ones who have strayed into fruitless discussion — a direct link.
2 Timothy 2:18 uses the same 'swerved' for those deviating from the truth, paralleling the wandering into vain discussion.
In 2 Timothy 2:23, Paul urges refusing 'foolish and ignorant speculations' — the same kind of fruitless talk that leads to quarrels.
In 2 Timothy 2:24, the Lord's servant must not be quarrelsome — contrasting the behavior of those who stray into fruitless discussion.
In Titus 1:10, false teachers are called 'empty talkers' — a direct parallel to the fruitless discussion Paul warns about.
In Titus 3:9, Paul says to avoid foolish controversies as 'unprofitable and worthless' — the same fruitless nature as here.