Sunan an-Nasa'i 1442

Ya‘qub ibn Mahan informed us; he said: al-Qasim ibn Malik narrated to us, from Ayyub ibn ‘A’idh, from Bukayr ibn al-Akhnas, from Mujahid, from Ibn ‘Abbas, who said: “Allah, Mighty and Majestic, prescribed the prayer through the words of your Prophet (peace and blessings be upon him): four rak‘ahs when at home, two rak‘ahs when traveling, and one rak‘ah in fear.”