Choosing the plainer of two cups
On the night journey he was offered wine and milk, and took the milk.
الْحَمْدُ لِلَّهِ الَّذِي هَدَاكَ لِلْفِطْرَةِ
Jibrīl said: praise be to Allah who guided you to what is natural. Had you taken the wine, your community would have gone astray.
The full narration
Narrated Abu Huraira:Allah's Messenger (ﷺ) was presented with two cups one containing wine and the other milk on the night of his night journey at Jerusalem. He looked at it and took the milk. Gabriel said, "Thanks to Allah Who guided you to the Fitra (i.e. Islam); if you had taken the wine, your followers would have gone astray
Source
Ṣaḥīḥ al-Bukhārī · 4709
Ṣaḥīḥ
- Agreed upon as authentic (al-Bukhārī / Muslim)