“O Kunti, grant me some more offspring for the expansion of my race and for the benefit of the world. O blessed one, provide thou that I myself, my ancestors, and thine also, may always have the funeral cake offered to us. O, do what is beneficial to me, and grant me and the world what, indeed, is the best of benefits. O, do what, indeed, may be difficult for thee, moved by the desire of achieving undying fame. Behold, Indra, even though he hath obtained the sovereignty of the celestials, doth yet, for fame alone, perform sacrifices. O handsome one, Brahmanas, well-acquainted with the Vedas, and having achieved high ascetic merit, do yet, for fame alone, approach their spiritual masters with reverence. So also all royal sages and Brahmanas possessed of ascetic wealth have achieved, for fame only, the most difficult of ascetic feat. Therefore, O blameless one, rescue this Madri as by a raft (by granting her the means of obtaining offspring), and achieve thou imperishable fame by making her a mother of children.”

Pandu requesting Kunti to help Madri.
The Mahabharata/Book 1: Adi Parva/Section CXXIV