Tiger Woods took to social media to announce that his mother, Kultida Woods, had died and to share a heartfelt tribute.

Tiger Woods is mourning a significant loss in the family. The golf legend announced on social media that his mother, Kultida Woods, died early on Tuesday. She was 78. Woods, who has yet to play on the PGA Tour this season, made the announcement with “heartfelt sadness.” No cause of death was announced.

Kultida Woods, the Thai-born mother of Tiger Woods who instilled his dominant spirit and encouraged him to wear a red shirt on Sunday as his power color, died Tuesday at age 78.