Yes. While Bhishma was lying on the bed of arrows, lord Krishna pleased with his pure devotion showed his Vishwaroopa to Bhishma.
- Bhishma says that he is able to see the Vishwaroopa of Lord Krishna -
O Purushottama! I have sought refuge in your words and am able to see your divine form in the three paths. I can also see your true and eternal form. Your infinite energy bears up the wind along seven paths.Your head extends up to the firmament and your feet are on the goddess earth. The directions are your arms. Your eyes are the sun and Shakra is established in your valour. In our mind’s eye, we see your undecaying form. It has the complexion of the atasi flower. It is attired in yellow garments. It is like a cloud tinged with lightning. With a desire to attain the best objective, I have faithfully sought refuge with you.
- Chapter 1379 (51), Rajadharma parva, Mahabharata.
2. Lord Krishna confirms that he showed the Vishwaroopa to Bhishma -
Vasudeva replied, “O bull among men! O king! Since you have supreme devotion in me, I have shown you my divine form. O Indra among kings! O descendant of the Bharata lineage! I do not show this self to one without devotion, one with false devotion, or one without self-control. You have always been my devotee and you have always been devoted to the truth and have resorted to control, austerities, truth, generosity and attachment to purity. O Bhishma! O king! It is because of your own austerities that you have been able to see me.
- Chapter 1379 (51), Rajadharma parva, Mahabharata.