as thou killedst the Egyptian] He pretends deadly danger to himselfe, that he may indanger the life of Moses, who was so farre from killing any of his brethren, that by his good will they should not receive any wrong from any: Malice and anger is very forward to slander; as here Moses is made an usurping executioner, so was Lot made an usurping Judge by the lewd Sodomites, Genesis 19:9.
Moses feared] Not without good cause, and therefore he fled, verse 15. but in the eleventh to the Hebrews, the Apostle saith, by faith Moses forsooke Egypt not fearing the wrath of the King, verse 27. which that it may not seeme contradictory to this of Moses himselfe, we must distinguish of the departures of Moses from Egypt, which were two: the former that here mentioned, wherein his feare appeared to be more then his faith; the latter was after his contestation (by miracles) with Pharaohs stubbornesse, Chap. 10. 28, 29. and in this, his departure was not by way of fearefull flight, but of faithfull and couragious conquest.
Surely this thing is knowne] Though verse 12. he looked this way and that way lest any one should see him, but he that felt him, or his brother who was beaten by the Egyptian; yet some body saw him, or the Hebrew made some report, so that the secret came out.