وَلَسَوْفَ يُعْطِيكَ رَبُّكَ فَتَرْضَىٰ
Your Lord will surely give you, and you will be pleased.
Ad-Duḥā 93:3 denies feared abandonment; verse 93:5 promises future giving and ensuing satisfaction. The emphatic lām and sawfa bring the future promise into prominence, while fa-tarḍā connects giving with contentment.
The rhetorical progression is broader than a single particle: denied fears are followed by positive expectation and then promised giving. Sound analysis tracks that sequence instead of listing isolated grammatical markers.