Job 40:19
He is the chief of the ways of God: he that made him can make his sword to approach unto him.
Cross-reference
Job 41:33
Parallel
Job 41:33 says Leviathan has no equal on earth, just as Behemoth is first of God's ways—both unique creatures.
Isaiah 27:1
Parallel
Isaiah 27:1 explicitly describes God's sword punishing Leviathan, a parallel to the sword against Behemoth here.
Psalm 104:24
Related theme
Psalm 104:24 praises God's wisdom in making all creatures, echoing that Behemoth is the first of God's ways.