Rolling down the sleeves in prayer
If a person joins the congregation quickly out of fear of missing a Rak'ah, and the sleeves remain rolled up, then it is preferable for him to roll down his sleeves with Amal-e-Qalil (minimal movement), some during Qiyam, some in Ruku, some in Qawmah, some in Sajdah, and some in Jalsah. He should not adopt such a manner that it becomes Amal-e-Kathir (excessive movement) and the prayer is invalidated. (Aham Masail / Vol: 1 / Pg: 56)