وَتُجَمَّرُ الْأَكْفَانُ قَبْلَ أَنْ يُدْرَجَ فِيهَا وِتْرًا
Translation: Before wrapping the deceased in the shroud, perfume the shroud cloths with incense an odd number of times.
Tujammaru refers to perfuming with fragrant incense; witran means an odd number, such as three or five times.
The perfuming precedes wrapping and concerns funeral etiquette; the underlying validity of the shroud is a separate matter.