Donald Trump tweeted a cryptic warning to “lyin'” Ted Cruz on Tuesday, threatening to “spill the beans” on the Texas senator’s wife, Heidi Cruz.

In a tweet posted as polls closed during the Western Tuesday primaries, the GOP frontrunner for president wrote, “Lyin’ Ted Cruz just used a picture of Melania from a G.Q. shoot in his ad. Be careful, Lyin’ Ted, or I will spill the beans on your wife!”

The tweet is a response to a meme posted by the Super PAC Make America Awesome in which Trump’s wife, Melania, is pictured naked on a fur pelt accompanied by the words “Meet Melania Trump, your next first lady. Or you could support Ted Cruz on Tuesday.” The photo was taken from a GQ spread on the billionaire businessman’s wife in 2000, when she was Melania Knauss.

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Trump’s tweet was apparently reposted after he deleted one similar minutes earlier. While he doesn’t hint at the “beans” in question, BuzzFeed reported last March on a 2005 police report containing numerous redactions in which Heidi Cruz was seen sitting on the ground within 10 feet of a highway outside Austin, Texas. The reporting officer “did not detect any signs of intoxication,” but believed Cruz was a “danger to herself.” Ted Cruz was Texas solicitor general at the time.

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Cruz responded via Twitter moments after Trump’s tweet, saying: “Pic of your wife not from us. Donald, if you try to attack Heidi, you’re more of a coward than I thought. #classless.”

The Trump and Cruz campaigns did not immediately respond to TheWrap’s request for comment.

Lyin’ Ted Cruz just used a picture of Melania from a G.Q. shoot in his ad. Be careful, Lyin’ Ted, or I will spill the beans on your wife! – Donald J. Trump (@realDonaldTrump) March 23, 2016

Pic of your wife not from us. Donald, if you try to attack Heidi, you’re more of a coward than I thought. #classless https://t.co/0QpKSnjgnE – Ted Cruz (@tedcruz) March 23, 2016