Ashtangasamgraha 6.102

6.102

karañjanimbaje tikte nātyuṣṇe tatra nirdiśet |

kaṣāyatiktakaṭukaṃ sāralaṃ vraṇaṇodhanam ||

Among these, those from karañja and nimba should be designated as bitter and not excessively hot. / That from sarala is astringent, bitter, and pungent, and cleanses wounds.