Eid Mubarak! Gigi Hadid and Zayn Malik celebrated the Muslim holiday Eid al-Adha over the weekend with their respective moms, Yolanda Foster and Trisha Malik. The family affair was documented on Real Housewives of Beverly Hills alum Yolanda's Instagram account and has many fans wondering about 22-year-old Gigi's faith.

"Eid Mubarak to everyone celebrating," Yolanda, the 53-year-old mom of three — Gigi, Bella, 20, and Anwar, 18, — captioned the photo. The Hadids shared their Eid al-Adha celebration, which means the "Feast of Sacrifice," with Gigi's 24-year-old boyfriend Zayn and Trisha, who has three other children in addition to Zayn. Eid al-Adha is an Islamic holiday that honors Ibrahim for sacrificing his son Ishmael to Allah, to prove his faith. The story goes that as Ibrahim offered up his son, God replaced Ishmael with a sheep, therefore saving Ibrahim's son's life.

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❤️Eid Mubarak to everyone celebrating…….

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For those wondering about Gigi's religious background, her youngest sister — and Victoria's Secret Fashion Show 2017 model Bella — has previously gone on the record about her family's Islamic faith. Bella has confirmed that she and her siblings are half Dutch and half Palestinian. Their father Mohamed Hadid was born in Nazareth and experienced life as a refugee before immigrating to the United States as a teenager.

"He was always religious, and he always prayed with us," Bella told Porter Magazine. "I am proud to be a Muslim. My dad was a refugee when he first came to America, so it's actually very close to home for my sister and brother and me," she continued.

With everything going on in the current political climate regarding Syria and housing refugees, Bella admits she certainly feels a personal connection to the ongoing situation. "We shouldn't treat people as if they don't deserve kindness just because of their ethnicities. It's just not right. And that message — to be compassionate whenever possible — that's so important to me."