Let us pray for peace. Let us do Shanti Paath.
Like Gayatri Mantra, Shantih Paath is also a very important mantra. It may be recited as a part of Shantiprakanam, however, a Yajna typically concludes with Shantih Paath mantra. This mantra is also not chanted for the purpose of material gains, physical or otherwise.
The poignant prayer in the mantra is for peace everywhere in the universe. The prayer is for every thing in the universe, space, earth, water, vegetation, all learned people, all gods and even peace be free from harm and be conducive for peace. As a final part of the mantra, the person chanting the mantra, requests the Lord to grant him or her that peace also.
Om Shantih, Shantih, Shantih.