Skandapurana 6.3.1.42

6.3.1.42

tatastu vāmanaṃ nāma caturdaśatamaṃ smṛtam .
saṃkhyayā daśasāhasraṃ proktaṃ kulapate purā .. 1.42 ..

Then the fourteenth is remembered as the Vāmana by name; / in measure it was proclaimed of old, O patriarch, to be ten thousand [verses].