SB 7.4.1
sri-narada uvaca
evam vrtah sata-dhrtir
hiranyakasipor atha
pradat tat-tapasa prito
varams tasya sudurlabhan
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Narada Muni continued: Lord Brahma was very much satisfied by Hiranyakasipu’s austerities, which were difficult to perform. Therefore, when solicited for benedictions, he indeed granted them, although they were rarely to be achieved.