तत्र कन्यां वरारोहां तामुद्वहत मा चिरम् ॥ १५ ॥
pitrā mām anuvartatā
tatra kanyāṁ varārohāṁ
tām udvahata mā ciram
Since all of you are very much obedient to My orders, I ask you to immediately marry that girl, who is so well qualified with beauty and good qualities. According to the order of your father, create progeny through her.
The Pracetās not only were great devotees of the Supreme Personality of Godhead but were very obedient to the orders of their father. Therefore the Lord asked them to marry the daughter of Pramlocā.