Verse 32

कदाचित्प्रथमं व्योम प्रतिष्ठामधिगच्छति ।ततः प्रजायते ब्रह्मा व्योमजोऽसौ प्रजापतिः

In plain words

Sometimes ether is the first to attain its footing; then Brahmā is born from it, that Prajāpati, born of the ether.