Ramayana
वीर्येण तपसा चैव ते ऽधिकाः पूर्वजन्मनि । मानवा ये महात्मानस्त्वत्र त्रेतायुगे युगे ॥ 7-74-12 ॥
In valor and in austerity those great-souled men, who in their former birth had been superior, were here in this Treta age of equal eminence.
english translation