Musannaf Ibn Abi Shaybah 2492 — A woman opening the prayer: how high

Abd Rabbih bin Zaytun said: I saw Umm al-Darda' raise her hands to the level of her shoulders when beginning the prayer. When the imam said "Sami' Allahu liman hamidah" (Allah hears the one who praises Him), she would raise her hands in the prayer and say along with it "Allahumma rabbana laka al-hamd" (O Allah, our Lord, to You belongs all praise).