Some people were asking Allah's Messenger (ﷺ) questions mockingly. A man would say, "Who is my father?" Another man whose she-camel had gone astray would say, "Where is my she-camel? "So Allah revealed this Verse in this connection: "O you who believe! Ask not about things which, if made plain to you, may cause you trouble." (5.101)
Sahih al-Bukhari Book 65, Hadith 144
← Previous Hadith The Prophet (ﷺ) delivered a sermon the like of which I had never heard before. He said, "If you but knew what I know then you would have laughed little and wept much." On hearing that, the companions of the Prophet (ﷺ) covered their faces and the sound of their weeping was heard. A man said, "Who is my father?" The Prophet (ﷺ) said, "So-and-so." So this Verse was revealed: "Ask not about things which, if made plain to you, may cause you trouble." (5.101)

Sahih al-Bukhari Book 65, Hadith 143 Next Hadith → Bahira is a she-camel whose milk is kept for the idols and nobody is allowed to milk it; Sa'iba was the she-camel which they used to set free for their gods and nothing was allowed to be carried on it. Abu Huraira said: Allah's Messenger (ﷺ) said, "I saw `Amr bin 'Amir Al-Khuza`i (in a dream) dragging his intestines in the Fire, and he was the first person to establish the tradition of setting free the animals (for the sake of their deities)," Wasila is the she-camel which gives birth to a she-camel as its first delivery, and then gives birth to another she-camel as its second delivery. People (in the Pre-lslamic periods of ignorance) used to let that she camel loose for their idols if it gave birth to two she-camels successively without giving birth to a male camel in between. 'Ham' was the male camel which was used for copulation. When it had finished the number of copulations assigned for it, they would let it loose for their idols and excuse it from burdens so that nothing would be carried on it, and they called it the 'Hami.' Abu Huraira said, "I heard the Prophet (ﷺ) saying so."

Sahih al-Bukhari Book 65, Hadith 145