Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) was asked about borrowing leaven and bread, and he (peace and blessings be upon him) said: "Subhan Allah! This is indeed among the noble traits of character. Take the small and give the large, and take the large and give the small, and the best of you is the one who is best in repaying."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17325