Skandapurana 5.169.11

5.169.11

śatavarṣā tu yā nārī piṃḍikāṃ bhakṣayeddvijāḥ ..
sā'pi putravatī ca syādyadi vṛddhatamā bhavet .. 11 ..

even a woman of a hundred years who eats that cake, O brahmins, / she too would become endowed with a son, even if she be extremely old;