take a leaf out of someone's book

/T EY1 K AH0 L IY0 F AW0 T AH0 V S AH0 M W AH0 N EH0 S B UH0 K/
verb
  1. 1

    To adopt an idea or practice of another person.

Source: https://en.wiktionary.org/wiki/take%20a%20leaf%20out%20of%20someone's%20book