Exodus 2:11 And it came to pass in those days, when Moses was grown, that he went out unto his brethren, and looked on their burdens: and he spied an Egyptian smiting an Hebrew, one of his brethren. - Free Bible Online

      Ex 2:11-25. HIS SYMPATHY WITH THE HEBREWS.

      11. in those days, when Moses was grown--not in age and stature only, but in power as well as in renown for accomplishments and military prowess (Ac 7:22). There is a gap here in the sacred history which, however, is supplied by the inspired commentary of Paul, who has fully detailed the reasons as well as extent of the change that took place in his worldly condition; and whether, as some say, his royal mother had proposed to make him coregent and successor to the crown, or some other circumstances, led to a declaration of his mind, he determined to renounce the palace and identify himself with the suffering people of God (Heb 11:24-29). The descent of some great sovereigns, like Diocletian and Charles V, from a throne into private life, is nothing to the sacrifice which Moses made through the power of faith.
      he went out unto his brethren--to make a full and systematic inspection of their condition in the various parts of the country where they were dispersed (Ac 7:23), and he adopted this proceeding in pursuance of the patriotic purpose that the faith, which is of the operation of God, was even then forming in his heart.
      he spied an Egyptian smiting an Hebrew--one of the taskmasters scourging a Hebrew slave without any just cause (Ac 7:24), and in so cruel a manner, that he seems to have died under the barbarous treatment--for the conditions of the sacred story imply such a fatal issue. The sight was new and strange to him, and though pre-eminent for meekness (Nu 12:3), he was fired with indignation.

JFB.