Musannaf Ibn Abi Shaybah 6483 — The two rakahs of Fajr: at what time

Sayyidah Aishah (may Allah be pleased with her) said: The Prophet (peace and blessings be upon him) used to pray the two sunnah rak'ahs of Fajr between the adhan and the iqamah, just before the iqamah.