Lord Bhimasena believed that the prime duty of his avatar was to destroy evil and that this was a service to God. Hence, he offered his “killing” of Dushashana and Duryodhana to Lord Krishna by reciting the Manyu Sukta and Vrushabha Sukta respectively!
Anandatirtha Prathishtana 
Dear sir,
it is interesting to note that Vrushabha sukta extolls Srihari as against the popular notion “Rudra ” in comman parlance.
regards
chiraan
I have been advised by elders to chant rigveda’s Vrishaba Suktha. Hence let me know in which mandala rigveda this Vrishaba Duktha is available.