Numbers 9:3 gives the original Passover date, while here 9:11 provides the alternate date for those unable to keep it then.

Exodus 12:2-14 establishes the original Passover – timing and rituals – which Numbers 9:11 then applies to a delayed observance.

Exodus 12:8 gives the original command to eat unleavened bread and bitter herbs with the Passover — directly applied here.

2 Chronicles 30:2-15 describes Hezekiah's Passover in the second month, directly following the delayed observance provision here.

Deuteronomy 16:3 expands on unleavened bread as 'bread of affliction', reinforcing the same practice.

Deuteronomy 16:6 specifies the evening sacrifice time, matching the 'at even' timing here.

Exodus 12:43-49 specifies who may eat the Passover; this verse focuses on when to eat for the unclean – different but related regulations.