It is written, “You shall lend him sufficient for his needs, which he is lacking” [Re'eh 15:8]
Rashi points out: “Even a horse to ride on and a servant to run before him.”
In his book Ayelet HaShachar, the gaon Rabbi Aharon Leib Steinman Shlita notes that this passage deals with honor, not financial need.
This means that the mitzvah also consists of demonstrating honor to someone if honor is what he lacks.
A person once paid a visit to the home of the Chazon Ish. Upon leaving, the Chazon Ish accompanied him all the way outside, despite the fact that the person in question did not merit such honor. The Chazon Ish explained that it was precisely honor that he was lacking.
Source: Rabbi David Pinto