Its a poem belongs to " Pourya-ye Vali " that said :

تا توانی به جهان خدمت محتاجان کن

به دَمی یا دِرَمی یا قَدَمی یا قَلَمی

"As long as you can, serve those in need in this world,

With a breath, a penny, a step, or a pen."

I say more about it below

This Persian poem carries a profound message about the importance of service and generosity. It emphasizes that regardless of our capabilities or resources, we all have the ability to make a positive impact in the lives of others. The poem suggests that serving those in need doesn't necessarily require grand gestures or vast resources; even the smallest of actions, such as a kind word (represented by "a breath"), a small donation ("a penny"), a helping hand ("a step"), or advocating for change ("a pen"), can contribute to making the world a better place.

The simplicity and universality of the poem's message resonate deeply with readers, reminding them that they have the power to make a difference through their actions, no matter how small they may seem. It encourages empathy, compassion, and a sense of responsibility towards those less fortunate, inspiring individuals to engage in acts of kindness and service in their daily lives.

as I said before, this poem belongs to Pourya-ye Vali (پوریای ولی).

Pourya-ye Vali, also known as Pouria-ye Vali, was a prominent Iranian poet and mystic who lived during the 16th century. He is best known for his works in Sufi poetry, which often explore themes of love, devotion, and spiritual enlightenment.

Pourya-ye Vali's poetry reflects the influence of Sufi philosophy and mysticism, drawing on the rich tradition of Persian mystical literature. His verses are characterized by their deep spirituality, metaphysical exploration, and profound insights into the nature of existence.

While Pourya-ye Vali may not be as widely recognized as some other Persian poets like Rumi or Hafez, he holds a significant place in the tradition of Persian mystical poetry and has left a lasting impact on Persian literature and culture.

If you're interested in learning more about Pourya-ye Vali and his poetry, I recommend exploring translations of his works or scholarly analyses of his poetry to gain a deeper understanding of his contributions to Persian literature and mysticism.