Musar על שמואל א טז:ב

Have we not found in the case of Samuel that he asked. "How can I go? If Saul hears of it (that he is to anoint another) he will kill me" (I Sam. 16:2). And even though Samuel said this he must not be considered as of those who have little trust in God. And the Holy One, Blessed be He, responded, "Take a heifer with you and say, 'I have come to sacrifice to the Lord' " (thus providing Samuel with a remedy in his danger).