अथ यदूर्ध्वं मध्यन्दिनात्प्रागपराह्णात्स प्रतिहारस्तदस्य गर्भा अन्वायत्तास्तस्मात्ते प्रतिहृतानावपद्यन्ते प्रतिहारभाजिनो ह्येतस्य साम्नः ॥ ६ ॥
In plain words
Now, the time from midday until the afternoon is the pratihāra. To it the embryos in the womb are connected. Because of this, they are held securely and do not fall, for they share in the very nature of this Sāman's pratihāra.
Close to the Sanskrit
Now, that which is above midday and before afternoon, that is the pratihāra; to it the embryos are connected. Therefore they, being held back, do not fall down, for they are partakers of the pratihāra of this Sāman.