Worship and prayer are essential to spiritual growth and hence to Vedanta. They bring grace, without which nothing is achieved. One avenue to grace is the Durgā Saptaṣatī also known as Caṇḍī Pāṭhaḥ or Devī Mahātmyam.
The above 3 1/2 hour video is of the full pūjā, except the ārati. It may be played, downloaded in full or downloaded as an audio (mp3) file.
Seven Verses, the Sapta Ślokī, along with the Dhyāna Śloka, provide an abbreviated form of the Caṇḍī Pāṭhaḥ.