Yōga Sūtra 3.08

तदपि बहिरङ्गं निर्वीजस्य।

tadapi bahiraṅgaṁ nirvījasya।

[तत् अपि बहिः अङ्गं निर्वीजस्य।
tat api = in the same way; bahiḥ = they are external; aṅgaṁ = limbs; nirvījasya = compared to seedless;]

In the same way, they (dhāraṇā , dhyāna, samādhi) are external limbs compared to seedless (samadhi).