Musnad Ahmad 941:81

Hushaym narrated to us, 'Abd al-Malik informed us, from 'Ata', who said: Usamah said: I entered the House (the Ka'bah) with the Messenger of Allah, peace and blessings of Allah be upon him. He sat down, praised Allah, extolled Him, proclaimed His greatness (Takbir), and proclaimed His oneness (Tahlil). Then he stood up toward what was in front of him in the House, and he placed his chest, his cheek, and his hands upon it. He said: Then he proclaimed the greatness of Allah, proclaimed His oneness, and supplicated. Then he did that at all the corners. Then he went out and turned toward the Qiblah while he was at the door, and he said: "This is the Qiblah, this is the Qiblah," two or three times.