مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3239
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Tawoos said: The most knowledgeable of them told me: "...rather if he lends his land to his brother for free, that is better for him than renting it out for a specified amount of rent."
Musnad Ahmad 3263Its isnad is saheeh, al-Bukhari (2330) and Muslim (1550)]