SB 8.20.16

evaṁ śaptaḥ sva-guruṇā
 satyān na calito mahān
vāmanāya dadāv enām
 arcitvodaka-pūrvakam
Word for word: 
evam — in this way; śaptaḥ — being cursed; sva-guruṇā — by his own spiritual master; satyāt — from truthfulness; na — not; calitaḥ — who moved; mahān — the great personality; vāmanāya — unto Lord Vāmanadeva; dadau — gave in charity; enām — all the land; arcitvā — after worshiping; udaka-pūrvakam — preceded by offering of water.
Translation: 
Śukadeva Gosvāmī continued: Even after being cursed in this way by his own spiritual master, Bali Mahārāja, being a great personality, never deviated from his determination. Therefore, according to custom, he first offered water to Vāmanadeva and then offered Him the gift of land he had promised.