Matsyapurana 48.36

48.36

amogharetāstvaṃ cāpi na māṃ bhajitumarhasi
asminn evaṃ gate kāle yathā vā manyase prabho //

of the seed of Uśija, thy brother, he knows all the Vedas [and will not allow thy seed to fecundate in my womb]. Thou, O Bṛihaspati, art also one, whose seed never goes in vain. So do not approach me now. After I am delivered of this seed of Uśija, do as thou thinkest proper, O Lord.”—32-36.