So this is seriously one of my all-time favorite mantras, the Rakhay Rakanhaar mantra. My teacher Deva Kaur explained it as being able to give you elevation, or perspective over your life.
I've always felt it was a powerfully protective mantra and any time I feel truly afraid, it is the first one the comes to me to calm and protect me.
Here's the full version:
Rakhay rakhanhaar aap ubaariun
Gur kee pairee paa-eh kaaj savaariun
Hoaa aap dayaal manho na visaariun
Saadh janaa kai sung bhavjal taariun
Saakat nindak dusht khin maa-eh bidaariun
Tis saahib kee tayk naanak manai maa-eh
Jis simrat sukh ho-eh saglay dookh jaa-eh
These are the words of Guru Arjan, the 5th Sikh Guru, and are for complete protection. It is from the evening prayer (Rehiras), which adds energy to one’s being, and helps when you are physically weak or have limited wealth. It is a victory song which allows us to be guided by God’s graceful and merciful hand. It does away with the obstacles to fulfilling one’s destiny. Gives a person elevation and altitude over their life. (Spiritvoyage)