Chapter 2: Sloka 27

2.27

jātasya hi dhruvo mṛtyur
dhruvaṁ janma mṛtasya ca
tasmād aparihārye ’rthe
na tvaṁ śocitum arhasi

jātasya—one who has taken his birth; hi—certainly; dhruvaḥ—a fact; mṛtyuḥ—death; dhruvam—it is also a fact; janma—birth; mṛtasya—of the dead; ca—also; tasmāt—therefore; aparihārye—for that which is unavoidable; arthe—in the matter of; na—do not; tvam—you; śocitum—to lament; arhasi—deserve.

For one who has taken his birth, death is certain; and for one who is dead, birth is certain. Therefore, in the unavoidable discharge of your duty, you should not lament.