Sen. Bernie Sanders’ rivals for the 2020 Democratic presidential nomination wished him well on Wednesday, as the Vermont senator announced a suspension of his campaign to recover from a heart procedure.

“.@DrBiden [Jill, Biden’s wife] and I are sending our best wishes to @BernieSanders, Jane, and the whole Sanders family,” tweeted former Vice President Joe Biden, the race’s presumptive front-runner. “Anyone who knows Bernie understands what a force he is.

“We are confident that he will have a full and speedy recovery and look forward to seeing him on the trail soon.”

Massachusetts Sen. Elizabeth Warren, with whom Sanders has jockeyed for second place throughout the campaign’s early months, also tweeted a warm wish for Sanders’ health.

“Bruce [Warren’s husband], Team Warren, and I are sending all our best wishes for a speedy recovery to @BernieSanders,” she tweeted. “I hope to see my friend back on the campaign trail very soon.”

Sanders, 78, felt chest discomfort during a Tuesday event, and was found to have a blocked artery, his campaign announced Wednesday.

He had two stents inserted, and will be sidelined “until further notice,” the campaign announced.

“All of us here at @PeteForAmerica are sending our best wishes for a speedy recovery to Senator @BernieSanders,” wrote South Bend, Ind., Mayor Pete Buttigieg. “We’re thinking of him and his family today, and I look forward to seeing him back on the campaign trail very soon.”

Buttigieg, 37, has campaigned as a fresh-faced future of the party in a campaign cycle that has at times emphasized a yawning generation gap within the party.

Sanders is the oldest candidate among the crowded 2020 field, and would easily be the oldest president to take office were he to stay in the race and win.

Biden and Warren, however, are no spring chickens either, at 76 and 70, respectively.

“Oh no. Stay strong Bernie,” wrote outsider candidate Andrew Yang, along with emojis of a pair of hands folded in prayer and an American flag.

“Bernie’s fighting spirit will get him through anything and everything,” wrote Minnesota Sen. Amy Klobuchar. “Good to hear he is doing better and look forward to seeing him soon.”

The Democratic field is set to meet for a fourth primary debate in Ohio on Oct. 15.