Exodus 12:6-36 is the original Passover instruction; the exiles here obey that very command as they keep the feast.

Numbers 9:2 commands the Passover observance; the exiles here fulfill that same command as they keep the feast.

2 Chronicles 35:1 records Josiah's Passover at the temple; here the returned exiles similarly keep Passover at the rebuilt temple — a parallel reformation.

Joshua 5:10 records Israel's first Passover in Canaan after the conquest; this is a parallel restoration Passover after the return from exile.

2 Chronicles 30:1 describes Hezekiah's call for a national Passover; here the returned exiles also keep a communal Passover — a later parallel.