How to destruct array of numbers in an object and combine to one in javascript?

i have this object:

const memorized = [
 {
  verses: [1, 2, 3, 4, 5],
  when: '2022 Jan 14'
 },
 {
  verses: [6, 7, 8, 9]
  when: '2022 Jan 15'
 },
 {
  verses: [10, 11, 12, 13, 14, 15]
  when: '2022 Jan 16'
 },
...
]

and how can i get the total verses like this:

const total_verses = [1, 2, 3, 4, 5, ..., 15]

My possible solution would be:

let total_verses = []
memorized.map(ar => total_verses.push(...ar.verses))

But i would like to do it by just filtering or mapping.

Thanks in advance!