It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "The two rak'ahs before the Fajr prayer are 'at the setting of the stars' (the glorification at the time the stars set), and the two rak'ahs after Maghrib are 'after the prostrations' (the glorification after the prostrations)." This hadith has a sahih (authentic) chain, but the two Shaykhs did not record it. It has a supporting witness narrated from Abu Hurayrah (may Allah be pleased with him) through the narration of Hammad bin Salamah, but that is not on the conditions of this book.