Directly (SB cantos 9 - 12)
Srimad-Bhagavatam
SB Canto 9
SB 9.4.1, Purport:
There are two kinds of brahmacārīs. One may return home, marry and become a householder, whereas the other, known as bṛhad-vrata, takes a vow to remain a brahmacārī perpetually. The bṛhad-vrata brahmacārī does not return from the place of the spiritual master; he stays there, and later he directly takes sannyāsa. Because Nābhāga did not return from the place of his spiritual master, his brothers thought that he had taken bṛhadvrata-brahmacarya. Therefore, they did not preserve his share, and when he returned they gave him their father as his share.