Natyashastra
पुत्रानुत्पाद्य वध्वा च प्रयोगं च यथाक्रमम् । ब्रह्मणा समनुज्ञाताः प्राप्ताः स्वर्गं पुनः सुताः ॥ २२ ॥
Having begotten sons and performed the rite with the daughter-in-law, they, with Brahmā's permission, ascended to heaven once again.
english translation
putrAnutpAdya vadhvA ca prayogaM ca yathAkramam । brahmaNA samanujJAtAH prAptAH svargaM punaH sutAH ॥ 22 ॥
hk transliteration by Sanscript