Mahabharata 6.103.97

6.103.97

arjuna uvāca |
śikhaṇḍī nidhanaṃ kṛṣṇa bhīṣmasya bhavitā dhruvam |
dṛṣṭvaiva hi sadā bhīṣmaḥ pāñcālyaṃ vinivartate || 97 ||

"Arjuna said, 'Sikhandin, O Krishna, will certainly be the cause of Bhishma's death, for Bhishma, as soon as he beholds the prince of the Panchalas, abstains from striking. Therefore, keeping Sikhandin before him and at our head, we will, by that means, overthrow the son of Ganga. Even this is what I think. I will hold in check other great bowmen with my shafts. As regards Sikhandin, he will fight with Bhishma alone, that foremost of all warriors. I have heard from that chief of the Kurus that he would not strike Sikhandin, for having been born before as a woman he subsequently became a male person.'