Merits of the Talbiyah and Raising the Voice for it

At-Talbiyah

The Loud Pronouncement of Particular Expressions which are a Symbol/ Motto of Hajj Indicating a Pilgrim's Readiness to Serve and Obey Allah, In Response to His Invitation (to Hajj)

From the talbiyah of the Prophet (sallallaahu ‘alayhi wa sallam) was:

Labbaik-Allahumma Labbaik

I respond to Your Call  O Allah, I am at You Service

Labbaika,  laa Shareeka laka Labbaik

I respond to Your Call, You have no partner, I am obedient to Your Orders

Inna-l-Hamda wan-N’imata Laka wa-l-Mulk

All of the praises and blessings are for You, and the Sovereignty (Kingdom) (too)

Laa Shareeka Laka

You have no partners with You (al-Bukhaari) 

Labbaika ilaaha al-Haqq

I respond to your call O Lord of truth

Abdullah ibn ‘Umar made this addition to it:

Labbaika, Labbaika wa S’adaika

I respond to Your Call, Here I am at Your Service, Ready  to Obey You

wa-l-Khairu bi-Yadaika

and all Good is in Your Hand

Labbaika, wa-r-Raghbaa u ilaika wa-l-'Amal

Here I am at Your Service, unto You is the Petition, and Deeds (are also for You)

(Muslim)

Raising the voice with the talbiyah is prescribed due to the saying of the Prophet (sallallaahu ‘alayhi wa sallam): “Jibreel came to me and ordered me to command my companions and those with me to raise their voices with the talbiyah” 

And he said: “The best Hajj is that in which voices are raised (for talbiyah) and blood (of sacrificial animals) is shed”. 

The Prophet (sallallaahu ‘alayhi wa sallam) said: “No Muslim says the talbiyah  except that everything of trees and stones to his right and left say the talbiyah with him until the end of the earth. 

Women are not to raise their voices with talbiyah in the presence of non-mahram men.