Mbh 12.10.1c

That man only is capable of leading a solitary life of happiness in the woods who is unable to support sons and grandsons and the deities and Rishis and guests and Pitris. As the deer and boars and birds (though they lead a forest life) cannot attain to heaven, even so those Kshatriyas that are not bereft of prowess yet not given to doing good turns cannot attain to heaven by leading only a forest life. They should acquire religious merit by other ways. If, O king, anybody were to obtain success from renunciation, then mountains and trees would surely obtain it! These latter are always seen to lead lives of renunciation. They do not injure any one. They are, again, always aloof from a life of worldliness and are all Brahmacharins. If it be the truth that a person's success depends upon his own lot in life and not upon that of other, then (as a person born in the Kshatriya order) thou shouldst betake thyself to action. He that is reft of action can never have success. If they that fill only their own stomachs could attain to success, then all aquatic creatures would obtain it, for these have none else to support save their own selves. Behold, the world moves on, with every creature on it employed in acts proper to its nature. Therefore, one should betake oneself to action. The man reft of action can never obtain success."'"