17.21 Tu, but; the danam, gift; yat, which; diyate, is made; prati-upakara-artham, expecting reciprocation-with this purpose in view: 'In time, he will render service in return'-; va punah, or again; uddisya, with a desire for; its phalam, result-that, 'To me will accrue some unseen reward of this gift'-; and which is diyate, given; pariklistam, grudgingly, with reluctance; tat, that; is smrtam, considered to be; rajasam, born of rajas.