Yazid bin Kaisan (may Allah have mercy on him) was once praying when Salim bin Abi Al-Ja'd (may Allah have mercy on him) sought permission to enter. He said "Subhan Allah." After finishing the prayer, he said, "If a man is praying, saying 'Subhan Allah' should be considered as granting permission from him, and for a woman, clapping is her way of granting permission."