فَإِذَا رَكِبُوا۟ فِى ٱلْفُلْكِ دَعَوُا۟ ٱللَّهَ مُخْلِصِينَ لَهُ ٱلدِّينَ فَلَمَّا نَجَّىٰهُمْ إِلَى ٱلْبَرِّ إِذَا هُمْ يُشْرِكُونَ
"When they board the ship they call upon God, making their religion sincerely His. But when He brings them safe to land, at once they associate others with Him."
The same scene occurred at Luqmān 31/32 in almost the same words and was treated there. The two verses can be set side by side, and the difference lies in a single word:
| Luqmān 31/32 | al-ʿAnkabūt 29/65 | |
|---|---|---|
| The danger | Ghashiyahum mawjun ka'ẓ-ẓulal | Rakibū fi'l-fulk |
| The prayer | Daʿawu'llāha mukhliṣīna lahu'd-dīn | Daʿawu'llāha mukhliṣīna lahu'd-dīn |
| The rescue | Fa-lammā najjāhum ila'l-barr | Fa-lammā najjāhum ila'l-barr |
| The outcome | Fa-minhum muqtaṣid | Idhā hum yushrikūn |
Three sentences the same, the fourth different. This is an overlap that can be verified from the text, and it shows that the two sūras end the same scene with two different outcomes.
I record this as my own reading: in Luqmān the outcome was given in measured language (some of them keep to the middle way) and what the rest did was not said. In al-ʿAnkabūt that gap is filled. Read together, the two verses complete the picture.
And the particle idhā must be recorded: idhā hum yushrikūn — in Arabic this particle announces what happens all at once. That is, the turning is not a process; it is something that comes with setting foot on land.