Musannaf Ibn Abi Shaybah 23199 — Selling fruit: when it may be sold

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) forbade selling fruit before budu al-salah (the appearance of ripeness). Sayyiduna Anas (may Allah be pleased with him) was asked: What is meant by budu al-salah? He (may Allah be pleased with him) said: That the fruit turns red or yellow.