Backsliding

Back·slid·ing

Backsliding

a.
  1. Slipping back; falling back into sin or error; sinning.
    Turn, O backsliding children, saith the Lord.
    — Jer. iii. 14.

Backsliding

n.
  1. The act of one who backslides; abandonment of faith or duty.
    Our backslidings are many.