Imam Bukhari narrates: Muhammad bin Abdullah bin Hawshab narrated to us, he said: Abdul Wahhab narrated to us, he said: Humaid narrated to us from Anas, may Allāh be pleased with him, that the Prophet ﷺ said:
O Bani Salamah! Why do you not count your steps.
And Mujahid said: And whatever deeds people send ahead, We keep writing them, and also the deeds which they leave behind. (Ya-Sin: ) In this verse, "athar" means the marks of their footsteps.
Reference: Sahih Al Bukhari 655