二挾侍 The two attendants by the side of Amitābha, i.e. 觀音 Guanyin and 大勢至 Mahāsthāmaprāpta; also the two by Yaoshi, the Master of Medicine, i.e. 日光 sunlight and 月光 moonlight; also the two by Śākyamuni, i.e. 文殊 Mañjuśrī and 普賢 Samantabhadra.
一二脇士 又稱二挾侍。謂侍於中尊左右之二菩薩。如彌陀如來兩旁之觀音、勢至二菩薩，藥師如來兩旁之日光、月光二菩薩，釋迦如來兩旁之文殊、普賢二菩薩。p314
又名二挾持，或兩脇士，即在佛左右協助弘法的人。阿彌陀佛的二脇士是觀世音和大勢至二菩薩，葯師佛的二脇士是日光和月光二菩薩，釋迦佛的二脇士是文殊和普賢二菩薩。