It is permissible to eat soup, and it is recommended to eat squash, And for the people eating together to show preference to one another even if they are guests, so long as the host does not object to that

Anas b. Malik reported:

A tailor invited Allah's Messenger (ﷺ) to a meal which he had prepared. Anas b. Malik said: I went along with Allah's Messenger (ﷺ) to that feast. He presented to Allah's Messenger (ﷺ) barley bread and soup containing pumpkin, and sliced pieces of meat. Anas said: I saw Allah's Messenger (ﷺ) going after the pumpkin round the dish, so I have always liked the pumpkin since that day.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ مَالِكِ بْنِ أَنَسٍ، فِيمَا قُرِئَ عَلَيْهِ عَنْ إِسْحَاقَ بْنِ عَبْدِ، اللَّهِ بْنِ أَبِي طَلْحَةَ أَنَّهُ سَمِعَ أَنَسَ بْنَ مَالِكٍ، يَقُولُ إِنَّ خَيَّاطًا دَعَا رَسُولَ اللَّهِ صلى الله عليه وسلم لِطَعَامٍ صَنَعَهُ ‏.‏ قَالَ أَنَسُ بْنُ مَالِكٍ فَذَهَبْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم إِلَى ذَلِكَ الطَّعَامِ فَقَرَّبَ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم خُبْزًا مِنْ شَعِيرٍ وَمَرَقًا فِيهِ دُبَّاءٌ وَقَدِيدٌ ‏.‏ قَالَ أَنَسٌ فَرَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَتَتَبَّعُ الدُّبَّاءَ مِنْ حَوَالَىِ الصَّحْفَةِ ‏.‏ قَالَ فَلَمْ أَزَلْ أُحِبُّ الدُّبَّاءَ مُنْذُ يَوْمَئِذٍ ‏.‏

Anas b. Malik reported that a person invited Allah's Messenger (ﷺ) to a meal. I also went along with him. He brought soup containing pumpkin. Allah's 'messenger (ﷺ) ate that pumpkin with relish. He (Anas) said:

When I saw that I began to place it before him, and did not eat it (myself). Anas said: It was since then that pumpkin was always my favourite (food).

حَدَّثَنَا مُحَمَّدُ بْنُ الْعَلاَءِ أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ سُلَيْمَانَ بْنِ الْمُغِيرَةِ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، قَالَ دَعَا رَسُولَ اللَّهِ صلى الله عليه وسلم رَجُلٌ فَانْطَلَقْتُ مَعَهُ فَجِيءَ بِمَرَقَةٍ فِيهَا دُبَّاءٌ فَجَعَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَأْكُلُ مِنْ ذَلِكَ الدُّبَّاءِ وَيُعْجِبُهُ - قَالَ - فَلَمَّا رَأَيْتُ ذَلِكَ جَعَلْتُ أُلْقِيهِ إِلَيْهِ وَلاَ أَطْعَمُهُ ‏.‏ قَالَ فَقَالَ أَنَسٌ فَمَا زِلْتُ بَعْدُ يُعْجِبُنِي الدُّبَّاءُ ‏.‏

Anas b. Malik rdported that a tailor invited Allah's Messenger (ﷺ) to a feast. There has been an addition to this that Thabit said:

I heard Anas saying that any meal that was prepared for me after that I tried that it should contain pumpkin.

وَحَدَّثَنِي حَجَّاجُ بْنُ الشَّاعِرِ، وَعَبْدُ بْنُ حُمَيْدٍ، جَمِيعًا عَنْ عَبْدِ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ ثَابِتٍ الْبُنَانِيِّ، وَعَاصِمٍ الأَحْوَلِ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَجُلاً، خَيَّاطًا دَعَا رَسُولَ اللَّهِ صلى الله عليه وسلم ‏.‏ وَزَادَ قَالَ ثَابِتٌ فَسَمِعْتُ أَنَسًا يَقُولُ فَمَا صُنِعَ لِي طَعَامٌ بَعْدُ أَقْدِرُ عَلَى أَنْ يُصْنَعَ فِيهِ دُبَّاءٌ إِلاَّ صُنِعَ ‏.‏