Combining the Prophet’s (peace and blessings be upon him) going out for prayer with the time of the iqamah and his standing when the adhan is called

Question:
May Allah reward you, Honorable Shaykh. This questioner says: I am confused about combining the fact that the Prophet (peace and blessings be upon him) did not go out for prayer except at the time of the iqamah, with what came from Aisha (may Allah be pleased with her) to the effect that the Prophet (peace and blessings be upon him), when he heard “Hayya ‘ala al-salah” (Come to prayer), would stand up as if he did not recognize any of us.

Answer:
That is, he would stand up for prayer in his house, standing up for the regular voluntary prayers in his house.