Visuddhimagga XVI-41

 Yaṃ pana jātassa taruṇavaṇasadisasukhumālasarīrassa hatthagahaṇanahāpanadhovanacoḷaparimajjanādikāle sūcimukhakhuradhārāhi vijjhanaphālanasadisaṃ dukkhaṃ uppajjati, idaṃ mātukucchito bahinikkhamanamūlakaṃ dukkhaṃ.

（五）初生的如嫩芽的身体，以手取之而浴而洗及以布拭等的时候，如受针刺及剃刀割裂之苦一样。这是由于从母胎出外之苦。

Ñ(XVI,41): The pain that arises in him after he is born, and his body, which is as delicate as a tender wound, is taken in the hands, bathed, washed, rubbed with cloths, etc., and which pain is like being pricked with needle points and gashed with razor blades, etc.—this is the suffering rooted in venturing outside the mother's womb. [501]