Matsya Purana 202.9

202.9

agastyaputraṃ dharmajñaṃ āgastyāḥ kratavastataḥ.
pulahasya tathā putrāstrayaśca pṛthivīpate! .. 202.9 ..

Matsya said:—"King! at the end of the Vaivasvata manvantara Kratu was without an offspring when he adopted as his son Idhmavâha, the virtuous son of Agastya, consequently those belonging to the family of Idhmavāha are called Āgastya and Kratu Paulaha had three sons Afterwards I will tell you of their origin He was not pleased with them.—8-10