This madd means «exchange lengthening» (madd al-badal — مَدُّ الْبَدَلِ) — is the substitution of the second hamzah with a sukoon to one of the madd letters corresponding to the haraka (vowel) of the previous letter.
The exchange madd takes place if the madd letters follow hamzah:
Examples:
Length: it should be stretched for 2 counts.
The basis *ءَا*مَنُ — *أَأْ*مَنُ the second hamzah with a sukoon is substituted to ا, as ا suits fathah.
The basis *أُو*تُوا — *أُؤْ*تُوا the second hamzah with a sukoon is substituted to و, as و suits dammah.
The basis *إِي*مَن — *إِإْ*مَان the second hamzah with a sukoon is substituted to ي , as ي suits kasrah.
Note:
If Wasl is followed by Hamzah in one word, then we omit that wasl and read the hamzah.
Example:
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الَّذِي اؤْمِنَالَّذِءْتُمِنَ If this word is read separately, we remove the hamzah leaving و , then we place dammah where there was wasl and read:
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إِلَى الْهُدَى ائْتِنَاإِلَى الْهُدَءْتِنَا If this word is read separately, we remove the hamzah leaving ي, then we place kasrah where there was wasl and read:
Exercises:
1. Find madd al-badal in the surah al-’Asr:
2. Find madd al-badal in the surah at-Tin:
Questions:
1. What is «exchange madd»?
2. For how many counts is it stretched?