Do not harm any living thing

69. Listen to me, Lady! Know that only the wise man
who never does anything which leads to the destruction of
any form of life, such as insects, worms, birds or plants, is a
person who is seeking true knowledge.

70. He (the true aspirant) should not pull out tender roots
(of fragrant plants, which is often done for worship); he
should not even pluck the leaves; he should not harm any
living thing out of anger; he should not heartlessly pluck
even flowers.

From Devikalottara - Collected Works of Sri Ramana Maharshi