וַיִּ֤פֶן כֹּה֙ וָכֹ֔ה וַיַּ֖רְא כִּ֣י אֵ֣ין אִ֑ישׁ וַיַּךְ֙ אֶת־הַמִּצְרִ֔י וַֽיִּטְמְנֵ֖הוּ בַּחֽוֹל׃
And he looked this way and that way, and when he saw that there was no man, he smote the Egyptian, and hid him in the sand.
Read Jewish philosophical commentary on Exodus 2:12: and classical philosophical sources.