Jabir bin Abdullah reported,
The Messenger of Allah ﷺ said, "When the people of Paradise enter Paradise, Allah 
will say, 'Do you desire anything more that I may give you?' They will reply, 'Our Lord, what could be greater than what You have already given us?' He will say, 'My pleasure is greater.'"
Azami 12495
Sahihعن جابر بن عبد الله قال
قال رسول الله ﷺ: إذا دخل أهل الجنة الجنة قال: يقول الله عز وجل: هل تشتهون شيئا فأزيدكم؟ فيقولون: ربنا وما فوق ما أعطيتنا؟ قال: يقول: رضواني أكبر.
No references are available.
Ibn Hibban (7439) and Hakim (1/82) both narrated it through Muhammad bin Yusuf Firyabi, who said, Sufyan Thawri narrated to us, from Muhammad bin Munkadir, from Jabir bin Abdullah, who said... and then he mentioned it. The wording given is that of Hakim, and Ibn Hibban's wording is similar to it. Its chain of transmission is sahih. Hakim said, "Sahih according to the criteria of the two Shaykhs."