Taught to ʿAlī with an image attached
Two words, each explained by something physical.
قُلِ اللَّهُمَّ اهْدِنِي وَسَدِّدْنِي وَاذْكُرْ بِالْهُدَى هِدَايَتَكَ الطَّرِيقَ وَالسَّدَادِ سَدَادَ السَّهْمِ
Allāhumma-hdinī wa saddidnī.
“O Allah, guide me and keep me straight.”
He said: by guidance remember the guiding of the road, and by straightness remember the straightening of an arrow.
The full narration
Ali reported that Allah's Messenger (ﷺ) said to him:Say," O Allah, direct me to the right path and make me adhere to the straight path," and when you make a mention of right guidance, keep in mind the right path and when you consider of the straight (path), keep in mind the straightness of the arrow
Source
Ṣaḥīḥ Muslim · 6911
Ṣaḥīḥ
- Agreed upon as authentic (al-Bukhārī / Muslim)