Mahabharata 13.99.26

13.99.26

atītānāgate cobhe pitṛvaṃśaṃ ca bhārata |
tārayedvṛkṣaropī ca tasmādvṛkṣānpraropayet || 26 ||

The man who plants trees rescues the ancestors and descendants of both his paternal and maternal lines. Do thou, therefore, plant trees, O Yudhishthira! The trees that a man plants become the planter's children. There is no doubt about this. Departing from this world, such a man ascends to Heaven. Verily many eternal regions of bliss become his. Trees gratify the deities by their flowers; the Pitris by their fruits; and all guests and strangers by the shadow they give. Kinnaras and Uragas and Rakshasas and deities and Gandharvas and human beings, as also Rishis, all have recourse to trees as their refuge. Trees that bear flowers and fruits gratify all men. The planter of trees is rescued in the next world by the trees he plants like children rescuing their own father. Therefore, the man that is desirous of achieving his own good, should plant trees by the side of tanks and cherish them like his own children. The trees that a man plants are, according to both reason and the scriptures, the children of the planter. That Brahmana who excavates a tank, and he that plants trees, and he that performs sacrifices, are all worshipped in heaven even as men that are devoted to truthfulness of speech. Hence one should cause tanks to be excavated and trees to be planted, worship the deities in diverse sacrifices, and speak the truth.'"