Word heaping

Word heaping is a technique used for text justification in Arabic script, in which one word can be placed over another to save space on the line.^[1]

Heap ligatures in Unicode

Arabic Presentation Forms-A has a few characters defined as "word ligatures" for terms frequently used in formulaic expressions in Arabic. A few example ligatures that feature heaping are shown below:^{[n 1]}

• U+FDFA ﷺ‎ ARABIC LIGATURE SALLALLAHOU ALAYHE WASALLAM (صلى الله عليه وسلم "peace be upon him")
• U+FDFB ﷻ‎ ARABIC LIGATURE JALLAJALALOUHOU (جل جلاله "may His glory be glorified")
• U+FDFD ﷽‎ ARABIC LIGATURE BISMILLAH AR-RAHMAN AR-RAHEEM (بسم الله الرحمن الرحيم "in the name of God, the Most Gracious, the Most Merciful")