Samantha Busch spoke out publicly about the sudden death of her husband, two-time NASCAR Cup Series champion Kyle Busch, on her Instagram Friday.

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“The prayers, messages, flowers, meals, hugs, and countless acts of kindness have carried us through the most heartbreaking days of our lives,” Busch said. “While our hearts are absolutely shattered, we have felt God’s presence and arms wrapped tightly around us through each and every one of you.”

In the post, she added that the family has had a lot of love “during this unimaginable time” and that they have received “comfort in the middle of so much pain.”

His family said that Kyle died after he was hospitalized for pneumonia that progressed “into sepsis, resulting in rapid and overwhelming associated complications.”

Kyle Busch took home first place in the most races in history: 234 races across the sport’s three national series.

The Instagram post, accompanied by the caption, includes a photo of the family of four. In the photo, Samantha is pictured with Kyle and their two children, Brexton Busch, 11, and Lennix Busch, 4. Brexton is seen on Kyle’s back while Samantha holds Lennix.