ॐ द्यौः शान्तिरन्तरिक्षं शान्तिः

पृथिवी शान्तिरापः शान्तिरोषधयः शान्तिः ।

वनस्पतयः शान्तिर्विश्वेदेवाः शान्तिर्ब्रह्म शान्तिः

सर्वं शान्तिः शान्तिरेव शान्तिः सा मा शान्तिरेधि ॥

ॐ शान्तिः शान्तिः शान्तिः ॥

Om Dyauh Shaantir-Antarikssam Shaantih
Prthivii Shaantir-Aapah Shaantir-Ossadhayah Shaantih |
Vanaspatayah Shaantir-Vishvedevaah Shaantir-Brahma Shaantih
Sarvam Shaantih Shaantir-Eva Shaantih Saa Maa Shaantir-Edhi |
Om Shaantih Shaantih Shaantih ||

Meaning:
1: Om, Peace is in Sky; Peace is in Space (between Earth and Sky);
2: Peace is in Earth; Peace is in Water; Peace is in Plants;
3: Peace is in Trees; Peace is in Gods (presiding over the various elements of Nature); Peace is in Brahman (Absolute Consciousness);
4: Peace is pervading everywhere; Peace alone (which is outside) is in Peace (which is inside); May you be (established in) that Peace (and make your life fulfilled);
5: Om, Peace, Peace, Peace.

https://greenmesg.org/stotras/vedas/om_dyauha_shanti.php

Shanti – What is it? Peace

What is peace? Let’s say you have a headache and it goes away – you suddenly find peace
Or your desire gets fulfilled. And you find peace / joy

But I am not referring to that peace

There is a peace when there is no existence. The time before time.
The space before the Big Bang space
The peace that created sound
The peace that created Gods

Now that is the real peace

Very difficult to comprehend. After all how can chaos and thoughts understand what it is like before thoughts occur