Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Muhammad bin Munkadir that the Messenger of Allah, peace and blessings be upon him, said: When your mother calls you while you are in prayer, respond to her, but if your father calls you, do not respond to him.

Hazrat Mak'hool says that when your mother calls you during prayer, respond to her, but if your father calls you, do not respond until you have finished the prayer.

Hazrat Awam says that I asked Hazrat Mujahid, "If the prayer has started and my mother calls me, what should I do?" He replied, "Respond to your mother."

Hazrat Umar considered it undesirable for a person to have shackles on his feet while performing prayer.