śrī-śuka uvāca
ity uktvā yajñiye kāle
vavre yuktān sa ṛtvijaḥ
kṛṣṇānumoditaḥ pārtho
brāhmaṇān brahma-vādinaḥ
sri-sukah uvaca -- Sukadeva Gosvami said; iti -- thus; uktva -- speaking; yajniye -- appropriate for the sacrifice; kale -- at the time; vavre -- chose; yuktan -- suitable; sah -- he; ritvijah -- sacrificial priests; krishna -- by Lord Krishna; anumoditah -- sanctioned; parthah -- the son of Pritha (Yudhishthira); brahmanan -- brahmanas; brahma -- of the Vedas; vadinah -- expert authorities.
The great Bhagavatam commentator Sridhara Svami explains that the proper time for the sacrifice mentioned here was the spring.