In a four-rak'ah emphasized Sunnah:
• the first sitting is limited to Tashahhud;
• when standing for the third rak'ah, the opening Thana is not repeated.
The source contrasts this with a non-emphasized four-rak'ah voluntary prayer, where the later pair is treated more independently and the opening supplication may be repeated.
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Emphasized Sunnahs and Other Voluntary Prayers
In a four-rak'ah emphasized Sunnah:
• the first sitting is limited to Tashahhud;
• when standing for the third rak'ah, the opening Thana is not repeated.
The source contrasts this with a non-emphasized four-rak'ah voluntary prayer, where the later pair is treated more independently and the opening supplication may be repeated.