הלכה על אבות 1:4

And this commandment is practiced in every place and at all times by males. And it is also a commandment upon females to listen to the words of [Torah] sages, so that they will learn to know God. And one who transgresses it and does not associate with them and fix their love in his heart and strive for their good and their benefit at times when he has the ability in his hand to do so, has violated this positive commandment. And his punishment is very great, as they are [essential for] the existence of the Torah and a strong foundation for spiritual salvation; as anyone who is with them often will not sin quickly. And King Shlomo stated (Proverbs 13:20), "He who walks with the wise becomes wise." And our Rabbis, may their memory be blessed, said (Avot 1:4), "Become dirty in the dust of their feet." And Ramban, may his memory be blessed, wrote (in his glosses to the Sefer HaMitzvot, Mitzvot Ase 7) that the essence of this commandment is to swear in His name, blessed be He, to fulfill a commandment. And the proof is from that which they said in Temurah 3b, "From where [do we know] that we swear to fulfill a commandment? As it is stated (Psalms 119:106), 'I have sworn to keep Your just statutes.'" And they answered there that it is derived from "to Him shall you cling," as it appears there.