Sagarbha and Agarbha Pranayama

अगर्भश्च सगर्भश्च प्राणायामो द्विधा स्मृतः |
जपं ध्यानं विनागर्भः सगर्भस्तत्समन्वयात् || 33 ||
अगर्भाद्गर्भसंयुक्तः प्राणायामःशताधिकः |
तस्मात्सगर्भं कुर्वन्ति योगिनः प्राणसंयमम् || 34 ||

Pranayama is said to be of two kinds – Sagarbha and Agarbha. Without
japa (chanting) and meditation (is) Agarbha, Sagarbha is with that
(japa and meditation).
Sagarbha is hundred times more (valuable) than Agarbha. Therefore
Yogis do Sagarbha Pranayama.

Recall shloka 30 of Chapter 14 of Vayaviya Samhita, later part which
says that japa with Pranayama is called Sagarbha japa.

प्राणायामसमायुक्तस्सगर्भो जप उच्यते | 30