CC Ādi 5.134

ei-rūpe nityānanda ‘ananta’-prakāśa
sei-bhāve — kahe muñi caitanyera dāsa
Word for word: 
ei-rūpe — in this way; nityānanda — Lord Nityānanda; ananta-prakāśa — unlimited manifestations; sei-bhāve — in that transcendental emotion; kahe — He says; muñi — I; caitanyera dāsa — the servant of Lord Caitanya.
Translation: 
Thus Lord Nityānanda has unlimited incarnations. In transcendental emotion He calls Himself a servant of Lord Caitanya.