trees

 17. Afterwards goddess Parvati adopted a sapling of Asoka as her own son and nurtured it with waters brought by herself. 

18. She invited the Seven Sages and made them perform the auspicious and consecratory rites of the tree. Then the Sages spoke to that lady of slender body: 

19. “O goddess, it behoves you to fix a rule for the path pointed out by you alone. What will be the benefit in adopting trees as sons?” 

20-33 The goddess said: 

If a learned man digs a well in a village without water, he will rejoice in heaven as long as there is water in that well. A tank is on a par with ten wells. A lake is on a par with ten tanks. A girl is on a par with ten lakes. A sacrifice is on a par with ten girls (daughters). A son is on a par with ten sacrifi¬ ces and a tree is on a par with ten sons. This is my rule. It is invariable and it sanctifies the worlds. When the ruins are re¬ paired the benefit is considered to be twofold. Thus the origin of Gaijcsa (has been recounted).

Source

https://freeglobaluniversity.blogspot.com/search/label/Skanda

https://www.google.com/search?q=Seven+Trees