How the Secret of this Killing became known
Allah tells us that when Musa killed that Coptic,
فٲصبح في المدينة خايفا
So he became afraid in the city,
meaning, of the consequences of his action,
يترقب
looking about,
means, turning around and watching out, waiting for the consequences of his action to befall him.
فٳذا الذي استنصره باﻻإمس يستصرخه
when behold, the man who had sought his help the day before, called for his help (again).
He went out and about, and saw the man who sought his help the day before, fighting with another Coptic. When Musa passed by him, he called for his help again, against this other Coptic.
قال له موسى
Musa said to him:
إنك لغوي مبين
Verily, you are a plain misleader!
meaning, `you obviously lead people astray and are very evil.'