الْقَبْرُ رَوْضَةٌ مِنْ رِيَاضِ الْجَنَّةِ، أَوْ حُفْرَةٌ مِنْ حُفَرِ النِّيرَانِ
The grave is a garden from the gardens of Paradise, or a pit from the pits of Fire.
The narration gives contrasting images of what the intermediate condition may entail: ease and blessing, or constriction and suffering. Rawḍah evokes a garden, whereas ḥufrah evokes a pit. Their contrast underscores differences in outcome.
It is not necessary to infer an ordinary earthly garden or physical pit of a specified shape. The essential point is the genuine difference between bliss and punishment. Evaluation of a particular report's transmission and affirmation of the broader doctrine through multiple texts are separate matters.