Bhagavatapurana 3.12.50

3.12.50

jñātvā tad dhṛdaye bhūyaś cintayām āsa kaurava /
aho adbhutam etan me vyāpṛtasyāpi nityadā //

49 & 50. Then Brahma assumed a different body and thought of proceeding with the creation. Seeing that also the creation of Rishis possessed of great virtue was not sufficiently extensive, He began, O Vidura, to think over it again in His mind: "It is really a wonder that though I am busy every day, living beings do not increase; perhaps the Providence is interrupting it."