It took less than three weeks for Prince Alwaleed bin Talal Al Saud to flip from outraged investor to crucial supporter of Elon Musk’s $44 billion takeover of Twitter Inc.

“Great to connect with you my ‘new’ friend @elonmusk,” Alwaleed tweeted Thursday, shortly after a Securities and Exchange Commission filing showed he agreed to roll his entire $1.9 billion stake into a privatized Twitter. When Musk announced his $54.20-per-share offer in April, Alwaleed used the social-media platform to reject the offer, saying it didn’t “come close” to the company’s intrinsic value.

It’s unclear exactly how Musk swayed the Saudi billionaire — initially the Tesla co-founder mocked the Saudi royal — but sticking with the company is in keeping with Alwaleed’s tendency to hold tight on high-profile bets through ups and downs.