(Devarim 15:5) "Only if you hearken to the voice of the L-rd your G-d": From here they stated: If a man hearkens but a little, he is given to hear much. If he hearkens to the words of Torah, he is given to hear the words of the scribes. "to observe to do this entire mitzvah": that a "slight one" be as beloved by you as a "weighty one."
Sifrei Devarim 115
Tap any verse to see what it echoes — and start a chain or echo from it.