तस्यापि निरोधे सर्वनिरोधान्निर्बीजः समाधिः

tasyapi nirodhe sarva nirodhan nirbijah samadhih

When that too is calmed, all is calm and there is seedless samadhi.

Yoga Sutras of Patanjali, 1.51

tasyapi = that too
nirodhe = supress, restrain
sarva = all
nirodhan = supress, restrain
nirbijah = seedless
samadhih = samadhih (illumination)

I thought perhaps a metaphor for this could be when we feel love for no particular reason, it just seems to well up from somewhere within.