Volume 1, Book 11, Number 625:
Narrated Humaid:
Anas said, “The Prophet said, ‘O Bani Salima! Don’t you think that for every step of yours (that you
take towards the mosque) there is a reward (while coming for prayer)?” Mujahid said: “Regarding
Allah’s Statement: “We record that which they have sent before (them), and their traces” (36.12).
‘Their traces’ means ‘their steps.’ ” And Anas said that the people of Bani Salima wanted to shift to a
place near the Prophet but Allah’s Apostle disliked the idea of leaving their houses uninhabited and
said, “Don’t you think that you will get the reward for your footprints.” Mujahid said, “Their foot
prints mean their foot steps and their going on foot.”