Mbh 6.119.3c

Disregarding all those shafts, large in number, shot by those foremost of princes belonging to the Pandava host, Bhishma of undepressed soul penetrated into the Pandava ranks. And the grandsire baffled all those arrows, as if sporting the while. Frequently looking at Sikhandin the prince of the Panchalas with a laugh, he aimed not a single arrow at him, recollecting his femininity. On the other hand, he slew seven great car-warriors belonging to Drupada’s division. Then confused cries of woe soon arose amongst the Matsyas, the Panchalas, and the Chedis, who were together rushing at that single hero. With large numbers of foot-soldiers and steeds and cars, and with showers of arrows, O scorcher of foes, they overwhelmed that single warrior, viz., Bhishma the son of Bhagirathi, that scorcher of foes, like the clouds overwhelming the maker of day. Then in that battle between him and them, which resembled the battle between the gods and the Asuras in days of old, the diadem-decked (Arjuna), placing Sikhandin before him, pierced Bhishma (repeatedly).”