Vasiṣṭha's teaching (Mahārāmāyaṇa) 6.28.74

6.28.74

viharankuru kalyāṇa rāgadveṣaparikṣayam .
yatkiṃciduditaṃ loke yannabhasyatha vā divi .. 74

74. [Sanskrit available] Conduct yourself in this manner, O blessed Rama! and lessen gradually all your affection and dislike to this world and all worldly things. (i.e. Neither love nor hate aught at any time).

75. [Sanskrit available]
Whatever there exists in this earth, sky and heaven, is all obtainable by you, by means of the relinquishment of your eager desire and hatred.