Narrated Ibn 'Abbas (RA):

A man gave away a she-camel to Allah's Messenger (ﷺ). So he gave him something in return for it and asked, "Are you pleased?" He replied, "No." So he gave him more and asked, "Are you pleased?" He replied, "No." Again he gave him more and asked, "Are you pleased?" He replied, "Yes." [Reported by Ahmad and Ibn Hibban graded it Sahih (authentic)].

وَعَنْ اِبْنِ عَبَّاسٍ ‏-رَضِيَ اَللَّهُ عَنْهُمَا‏- قَالَ : { وَهَبَ رَجُلٌ لِرَسُولِ اَللَّهِ ‏- صلى الله عليه وسلم ‏-نَاقَةً، فَأَثَابَهُ عَلَيْهَا , فَقَالَ : " رَضِيتَ" ? قَالَ : لَا .‏ فَزَادَهُ , فَقَالَ : "رَضِيتَ"? قَالَ : لَا .‏ فَزَادَهُ .‏ قَالَ : "رَضِيتَ" ? قَالَ : نَعَمْ.‏ } رَوَاهُ أَحْمَدُ , وَصَحَّحَهُ اِبْنُ حِبَّان َ [1]‏