Nedarim 30B

ההולכים מעכו ליפו, דהלין יושבי היבשה נינהו, אלא ממי שדרכן לפרש.

who travel from Akko to Jaffa, for they are treated like those who reside on the land. Rather, the term seafarers means he took a vow that deriving benefit from those who customarily depart out to sea is forbidden to him.

ומאן דמתני אסיפא, מתני הכי: הנודר מיושבי יבשה ⁠— אסור ביורדי הים, ולא באלו ההולכים מעכו ליפו בלבד, אלא אפילו במי שדרכו לפרש, הואיל וסופו ליבשה סליק.

And the one who teaches it with regard to the latter clause of the Mishnah teaches in this manner: One who takes a vow not to derive benefit from those who reside on dry land is prohibited from deriving benefit from seafarers, and this is the halakha not only with regard to those who travel from Akko to Jaffa, who are certainly not considered seafarers, but even with regard to one who customarily departs to great distances. Why is such a person also considered a dweller on dry land? Since eventually he will go up onto dry land. No one lives his entire life at sea. Eventually, one will reach dry land, so all people are called dwellers on dry land.

מתני׳ הנודר מרואי החמה ⁠— אסור אף בסומין, שלא נתכוון זה אלא למי שהחמה רואה אותן.

Mishnah: One who takes a vow not to derive benefit from those who see the sun is prohibited from deriving benefit even from the blind, although they see nothing. This is because he meant only to include all those that the sun sees, i.e., shines upon with light.

גמ׳ מאי טעמא? מדלא קאמר ״מן הרואין״. לאפוקי דגים ועוברים.

Talmud: The Talmud explains why the Mishnah states that blind people are included: What is the reason for this? Since he did not say: From those who see, which would exclude blind people. Instead, he employed the phrase: Those who see the sun, which comes to exclude fish and fetuses, who do not see the sun. Consequently, the vow is interpreted to refer to those who are exposed to the sun, including the blind.