מדרש על שמואל א 2:30

Similarly, Moses declared: For if ye shall diligently guard (Deut. 11:22); that is, if you guard diligently the students of Torah, then you shall be guarded in turn. Hence Scripture states: For them that honor Me I will honor, and they that despise Me shall be lightly esteemed (I Sam. 2:30). This verse alludes to those who honor the students of the Torah.