Musannaf Ibn Abi Shaybah 38934 — Killing a free man for a slave: Abu

Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "Whoever catches one rak'ah of Asr before sunset has indeed caught the whole prayer, and whoever catches one rak'ah of Fajr before sunrise has indeed caught the whole prayer." It is mentioned that the view of (Imam) Abu Hanifah is: When a man has prayed one rak'ah of Fajr and the sun rises, this Fajr will not suffice him.