وَلَسَوْفَ يُعْطِيكَ رَبُّكَ فَتَرْضَىٰ
Your Lord will surely give to you, and you will be pleased.
Ad-Duḥā 93:5 contains emphatic futurity with lām and sawfa. The fāʾ in fa-tarḍā links the giving to its announced outcome, satisfaction. Thus 93:3–5 moves from reassurance to a better prospect and then to promised giving and contentment.
The rhetorical effect depends on the position of each expression in the sequence, not on the isolated force of sawfa alone.