Sforno on Genesis 47:17/ספורנו על בראשית מ״ז:י״ז

1וינהלם בלחם, he guided them slowly, as in Isaiah 40,11 עלות ינהל. He handed out food a little at a time. It was to be eaten but one should not stuff oneself on it. This is the proper way to conduct oneself during periods of famine. There is a saying that if one starves oneself a little during periods of famine he avoids dying an unnatural death Physicians confirm the reverse of this when they said that if someone overeats after starving for a period, he contracts a potentially fatal illness.

2בשנה ההיא, after they money had run out, the sixth year of the famine.