Verse 37

इदं चत्वारि संपीड्य पञ्चमं वर्धते यदा ।तदा तज्जात एवैष कुरुते जागतीं क्रियाम्

In plain words

When, pressing together these four, the fifth grows to fullness — then, born of that very one, this Prajāpati performs the work of the world.