Musnad Abu Ya'la al-Mawsili 105:32

Hajjaj narrated to us, Yazid bin Harun narrated to us, Ibn Abi Dhi'b informed us, from al-Zuhri, from Ubaydullah, from Ammar bin Yasir, who said: We were with the Messenger of Allah on a journey, and a necklace of Aisha’s was lost. They searched for it until morning, and there was no water with the people. Then the concession (rukhsah) was revealed. The Muslims stood up and struck the ground with their hands, then wiped their faces and the backs and palms of their hands up to the armpits with them.