Heidi

“They call it 'the whispering of the stars.' Listen," he said, raising a finger for silence. I could still hear the tinkling and craned my neck to see what it was. Zhensky laughed. "No, here. Look." He formed his mouth into a wide O and exhaled slowly. As he did, I saw the cloud of breath fall in droplets to the ground. That was the sound I heard: our breath falling. "It's a Yakut expression. It means a period of weather so cold that your breath falls frozen to the ground before it can dissipate. The Yakuts say that you should never tell secrets outside during the whispering of the stars, because the words themselves freeze, and in the spring thaw anyone who walks past that spot will be able to hear them.”
― Jon Fasman, The Geographer's Library