Quote from Marshall in The Three Days Rule
Robin: So Ted hasn't been texting Holli at all? He's been texting you two? Barney: Look, we knew he'd try to call her before the three days, so I swiped his phone, and I changed her number to my work cell. Marshall: We were just gonna bust on him for calling her too soon, but then he... started texting her. [flashback to Barney and Marshall at MacLaren's on the night Ted met Holli:] Barney: "Texty text"?! Marshall: Oh, Ted. Oh, poor, sweet Ted. We should... We should tell him it's us. Barney: Yeah. Or... we pretend we're Holli, and we're in the bath. Marshall: Yeah, that's better. [back in his apartment, Ted chortles]