Bhagavad Gita Chapter 2.11
śrī-bhagavān uvāca
aśocyān anvaśocas tvaḿ
prajñā-vādāḿś ca bhāṣase
gatāsūn agatāsūḿś ca
nānuśocanti paṇḍitāḥ
Translation
The Supreme Personality of Godhead said: While speaking learned words, you are mourning for what is not worthy of grief. Those who are wise lament neither for the living nor for the dead.