ekadā gṛham ānīya
ātithyena nimantrya tam
śraddhayopahṛtaḿ bhaikṣyaḿ
balena bubhuje kila
ekada -- once; griham -- to His (Balarama's) home; aniya -- bringing; atithyena -- as a guest; nimantrya -- inviting; tam -- him (Arjuna); sraddhaya -- with faith; upahritam -- presented; bhaikshyam -- food; balena -- by Lord Balarama; bubhuje -- he ate; kila -- indeed.
From the explanation of Srila Visvanatha Cakravarti, it is understood that Arjuna in his sannyasi role had just finished the four-month vows of the rainy season and could now again accept general invitations from householders. Thus no one would have suspected any unusual motive in his visiting Lord Balarama at this time.