Numbers 5:2 commands exclusion of those unclean by contact with the dead — the very principle Haggai uses to show uncleanness is transferable by touch.

Numbers 5:3 extends the quarantine rule, emphasizing that uncleanness defiles the camp where God dwells — reinforcing the seriousness of transferable uncleanness Haggai cites.

Numbers 9:6-10 addresses uncleanness from a dead body, the same source of impurity that Haggai uses as an analogy, offering a deferred Passover for the unclean.

Numbers 19:11-22 details purification from corpse defilement, the exact impurity type that Haggai references to illustrate contagious uncleanness.

Leviticus 22:6 forbids anyone with uncleanness, including from a dead body, from eating holy things—directly parallels the defilement transmitted to offerings here.

Numbers 19:22 explicitly states that uncleanness is contagious by touch—the very principle Haggai applies to the people's offerings.

Titus 1:15 presents a contrasting view: defilement comes from within, not by contact—reinterpreting the ceremonial principle of Haggai.

Leviticus 5:2 deals with uncleanness from touching carcasses—a different source but the same principle of defilement by contact as in Haggai.

Isaiah 52:11 commands touching no unclean thing when bearing the LORD's vessels—underscores the same purity principle required in worship as here.

Leviticus 12:4 prohibits a woman unclean from childbirth from touching holy things—a different impurity but the same principle of defilement barring contact with the sacred.