Vice President Kamala HarrisKamala HarrisPolitics must accept the reality of multiracial America and disavow racial backlash Symone Sanders to leave the White House at the end of the year Bidens to attend Kennedy Center Honors following Trumps' absence MORE and her husband Doug EmhoffDoug EmhoffThe Hill's Morning Report - Presented by Facebook - Biden talks up bright side beneath omicron's cloud Biden and Harris host 'family' Hanukkah celebration with more than 150 guests Bidens to attend Kennedy Center Honors following Trumps' absence MORE have become the first in American history to affix a mezuzah to an executive residence.

The second gentleman, the first Jewish spouse of a president or a vice president, shared photos of the couple's participation in the tradition on Instagram, writing that it was a fond reminder of years past.

"For us, and for everyone, Thanksgiving is a time for reflection on the past year," he wrote in the caption. "One of my favorite memories was when our family visited and together we hung a mezuzah on the front door of the Vice President’s Residence."

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The second family hung the sacred object on the entry door of the Naval Observatory with the help of Rabbi Peter Berg, who led the couple in a traditional ceremony, CNN reports.

"It's an extraordinary moment in United States history," Berg, of the Hebrew Benevolent Congregation (The Temple) in Atlanta, told CNN. "And it was one of the great honors of my lifetime to be able to stand there with the second family as they placed that mezuzah on their home for the very first time."

He added, "When I started talking, we all teared up because of the significance and the history."

Emhoff shared the photos ahead of the Thanksgiving holiday, which President BidenJoe BidenManchin to vote to nix Biden's vaccine mandate for larger businesses Congress averts shutdown after vaccine mandate fight Senate cuts deal to clear government funding bill MORE and first lady Jill BidenJill BidenThe Hill's Morning Report - Presented by Facebook - Biden talks up bright side beneath omicron's cloud Bidens to attend Kennedy Center Honors following Trumps' absence The Hill's 12:30 Report: Trump's pre-debate COVID-19 test sparks criticism MORE are expected to celebrate in Nantucket.