Shiva Purana

siva.sh/siva-purana/saturda-samhita/3/16

मनसा निर्मिताः सर्वे शिवे देवादयो मया ।। न वृद्धिमुपगच्छंति सृज्यमानाः पुनःपुनः ।। १६ ।।

sanskrit

O Śivā, the gods and others were mentally created by me. But they do not multiply themselves. Hence they are being created again and again.

english translation

manasA nirmitAH sarve zive devAdayo mayA || na vRddhimupagacchaMti sRjyamAnAH punaHpunaH || 16 ||

hk transliteration by Sanscript