Find your dua

Duas for replying to "i love you for allah".
Answer love with a du'a for Allah's love

When someone tells you they love you for the sake of Allah (SWT), the Sunnah reply asks Allah (SWT) to love them in return.

1 sourced Du'a Arabic, transliteration, meaning, and source
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Replying to "I love you for the sake of Allah (SWT)"

أَحَبَّكَ الَّذِي أَحْبَبْتَنِي لَهُ

Ahabbaka-lladhi ahbabtani lah.

“May the One for whose sake you love me, love you.”

Sunan Abi Dawud 5125 (hasan)

The reply to someone who tells you they love you for the sake of Allah (SWT).