Hadithcore
Riyad as-Salihin, 304

Abu Dharr (May Allah be pleased with him) reported:

Messenger of Allah (ﷺ) commanded me thus, "O Abu Dharr! Whenever you prepare a broth, put plenty of water in it, and and give some of it to your neighbours". <b>[Muslim]</b>. In another narration of Muslim, narrated Abu Dharr (May Allah be pleased with him): My friend, (Messenger of Allah (ﷺ)) advised me saying, "Whenever you prepare a broth, put plenty of water in it, and give some to your neighbours and then give them out of this with courtesy."

وعن أبي ذر رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم ‏:‏ ‏"‏يا أبا ذر إذا طبخت مرقة، فأكثر ماءها، وتعاهد جيرانك‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏ وفي رواية له عن أبي ذر قال‏:‏ إن خليلي صلى الله عليه وسلم أوصاني‏:‏ ‏"‏ إذا طبخت مرقًا فأكثر ماءها، ثم انظر أهل بيت من جيرانك، فأصبهم منها بمعروف‏"‏‏.‏

References1 variant
In-Book Reference
Introduction, Hadith 304
Sharh · explanationclick to expand
<b>Guidance from the Hadith:</b><br> 1) Exchanging gifts between neighbors is recommended because it fosters love and increases affection.<br> 2) One should not belittle anything of the acts of goodness no matter how simple it is, since all of them are good.<br> 3) The guidance of the Prophet (may Allah’s peace and blessings be upon him) is perfect, as he urged all that which reinforces bonds between the believers.