What is the meaning of "Swasti na Indro Vridhhashravaha..."?

Question

This mantra is very famous, mostly also used in TV shows while showing Yajnas. This is also known as Shanti Path Mantra:

ॐ भद्रं कर्णेभिः शृणुयाम देवाः ।
भद्रं पश्येमाक्षभिर्यजत्राः ।
स्थिरैरङ्गैस्तुष्टुवागँसस्तनूभिः ।
व्यशेम देवहितं यदायूः ।
स्वस्ति न इन्द्रो वृद्धश्रवाः ।
स्वस्ति नः पूषा विश्ववेदाः ।
स्वस्ति नस्ताक्षर्यो अरिष्टनेमिः ।
स्वस्ति नो ब्रुहस्पतिर्दधातु ।
ॐ शान्तिः शान्तिः शान्तिः ।।

Om Bhadram Karnebhiḥ Srinuyaam Devah।
Bhadram Pashyem Akshabhir Yajatrah।
Sthirair Angais Tushtuvagamsas Tanoobhih।
Vyashema Devahitam Yadaayooh।
Swasti Na Indro Vriddhashrava।
Swasti Na Poosha Vishwa-Vedaah।
Swasti Nastaaksharyo Arishtanemih।
Swasti No Brihaspatir-dadhaatu।
Om, Shaanti Shaanti Shaanti।।

From where are these mantras taken? And what are their meanings ?

Answer 1

This whole mantra forms the first passage of Taittariya Aranyaka of YajurVeda. The first verse "Om Bhadram Karnebhi Srinuyaam Devaha" also exists in RigVeda 1.89.8

Here is the meaning of the above mantra:

ॐ भद्रं कर्णेभिः शृणुयाम देवाः ।
Om Bhadram Karnebhiḥ Srinuyaam Devah

Om, May we hear what is Auspicious with our ears,Oh Gods

भद्रं पश्येमाक्षभिर्यजत्राः
Bhadram Pashyem Akshabhir Yajatrah

May we see what is Auspicious With our eyes, Oh holy ones worthy of Worship

स्थिरैरङ्गैस्तुष्टुवागँसस्तनूभिः
Sthirair Angais Tushtuvagamsas Tanoobhih

May we live a life of satisfaction with strong organs and Healthy body

व्यशेम देवहितं यदायूः
Vyashema Devahitam Yadaayooh

May we Praise the Lord during the life span given to us by the Gods

स्वस्ति न इन्द्रो वृद्धश्रवाः
Swasti Na Indro Vriddhashravah

May God Indra of Great fame bless us

स्वस्ति नः पूषा विश्ववेदाः
Swasti Na Poosha Vishwa-Vedaah

May the Omniscient Poosha bless us

स्वस्ति नस्ताक्षर्यो अरिष्टनेमिः
Swasti Nastaaksharyo Arishtanemih

May the Protector Garuda bless us

स्वस्ति नो ब्रुहस्पतिर्दधातु
Swasti No Brihaspatir-dadhaatu

May Lord Brihaspati protect us

ॐ शान्तिः शान्तिः शान्तिः
Om, Shaanti Shaanti Shaanti

Om, Peace, Peace, Peace

Hence in a single paragraph the mantra means:

Om, May we hear what is Auspicious with our ears,Oh Gods. May we see what is Auspicious With our eyes, Oh holy ones worthy of Worship. May we live a life of satisfaction with strong organs and Healthy body. May we Praise the Lord during the life span given to us by the Gods. May God Indra of Great fame bless us. May the Omniscient Poosha bless us. May the Protector Garuda bless us. May Lord Brihaspati protect us. Om, Peace, Peace, Peace

_{Refrences used from here.}