• tṛṇa-pīṭha — on seats of grass
  Compound: tṛṇa (grass) + pīṭha (seat). The simplest possible seat. Gauḍīyas contrast this with Bahulāśva's āsana-agryeṣu — and the verse's quiet point is that Kṛṣṇa is equally pleased with both.
• bṛṣīṣu — on mats of darbha grass
  Locative plural of bṛṣī — a small darbha-grass mat used by brāhmaṇas for sitting during ritual. The vocabulary precisely matches gṛhya-sūtra practice: Śrutadeva does whatever a brāhmaṇa is required to do, with the means he has.
• sva-āgatena — with words of welcome
  Compound: sva (own) + āgata (come). 'Welcome' — etymologically 'well-come.' The Vaiṣṇava welcome-formula is svāgatam — a single word; here used adverbially. Bhakti's first vocabulary is welcoming.
• sa-bhāryaḥ — together with his wife
  Compound: sa (with) + bhāryā (wife, lit. 'one to be supported'). Śrutadeva's wife shares in the foot-washing. Gauḍīyas insist gṛhastha-bhakti is dual — husband and wife as joint sevakas — and read SB 10.86.39 alongside 10.41.40 (Sudāmā-mālākāra and his wife).

• Padaseva Pr SB 10-86-39 Oriya
  His Grace Padaseva Prabhu· Oriya

The brāhmaṇa cannot offer thrones — only kuśa-grass and darbha mats. But the seats are good because the heart is full; Bhagavān reads upacāra-rasa, not upacāra-cost.