Buddhimanta Khan was very dear to Lord Chaitanya Mahaprabhu. He was one of the Lord’s greatest servants who obeyed him from the time of his birth.
(Chaitanya Charitamrita 1.10.74)
Buddhimanta paid for all the costs of Mahaprabhu’s wedding when he married for the second time, to Vishnupriya, the daughter of a local zamindar’s priest, Sanatan Mishra. He participated in all of Mahaprabhu’s Nabadwip pastimes--in the kirtans at Srivasa Angana, at Chandrasekhara’s house, in the public kirtans, the liberation of Jagai and Madhai, and the water sports in the Ganges.
[Mahaprabhu said,] Buddhimanta Khan! Go quickly and arrange for costumes for today I shall dance.” Upon receipt of the order, Sadashiva [and] Buddhimanta Khan immediately returned home, feeling unlimited joy. The devotees immediately put up an awning of bamboo and cloth and there started dressing the actors in the play. Buddhimanta brought the costumes and placed them before the Lord.
(Chaitanya Bhagavat 2.18.13-16)
Look here. This is the house of Chandrasekhara Acharya. The Lord came here with his dearest associates. Sadashiva and Buddhimanta Khan took charge of the costumes and dressing the actors.
When Mahaprabhu took sannyasa in Katwa, he went to Shantipur where he met with all the Nabadwip devotees, including Buddhimanta Khan. He also accompanied the Bengali devotees to Puri to see the Lord. The Lord also lovingly accepted Buddhimanta Khan and the Bengali devotees’ gifts of foodstuffs, etc., which they brought to Puri for him.
Buddhimanta Khan, for whom the Lord’s order had been the only interest from his very birth, also went.
(Chaitanya Bhagavat 3.8.30)
[Excerpted from "Sri Chaitanya: His Life & Associates" by Srila Bhakti Ballabh Tirtha Maharaj]