(ن) ثَابَ يَثُوْبُ ثَوْبًاthāba yathūbu thawban: for a thing to return to its origin; (1) to reach the intended destination (2) to receive a recompense (the deed returning to the one who did it).
ثَوَابٌthawāb / مَثُوْبَةٌmathūbah (noun, ism dhāt): recompense, requital, reward. ﴿وَاللّٰهُ عِنْدَهُۥ حُسْنُ الثَّوَابِ﴾ (Āl ʿImrān 3:195); ﴿لَمَثُوْبَةٌ مِّنْ عِنْدِ اللّٰهِ خَيْرٌ﴾ (Al-Baqarah 2:103)
مَثَابَةٌmathābah (noun of time or place, ẓarf, on the pattern مَفْعَلmafʿal, with the tāʾ of unity): a place to return to, a resort. ﴿وَاِذْ جَعَلْنَا الْبَيْتَ مَثَابَةً لِّلنَّاسِ﴾ (Al-Baqarah 2:125)
Form IV (ifʿāl) اَثَابَ يُثِيْبُ اِثَابَةًathāba yuthību ithābatan: to give something in return. ﴿فَاَثَابَهُمُ اللّٰهُ بِمَا قَالُوْا جَنّٰتٍ﴾ (Al-Māʾidah 5:85)
Form II (tafʿīl) ثَوَّبَ يُثَوِّبُ تَثْوِيْبًاthawwaba yuthawwibu tathwīban: to recompense. ﴿هَلْ ثُوِّبَ الْكُفَّارُ مَا كَانُوْا يَفْعَلُوْنَ﴾ (Al-Muṭaffifīn 83:36)
ثَوْبٌthawb pl. ثِيَابٌthiyāb: garment, cloth. ﴿وَثِيَابَكَ فَطَهِّرْ﴾ (Al-Muddaththir 74:4)