That his day is coming— i.e. The day of his punishment: so Jeremiah 5:31. For thy day is come, the time that I will visit thee. See Psalms 137:7. Job 18:20. Isaiah 9:4.
Related Commentaries of Psalms 37:13
Psalms 37:13
13 The Lord shall laugh at him: for he seeth that his day is coming.