1584. W. Warner, Syrinx (1597), O j. Vnrequitable are the duties, wherein we are … indebted to our Mothers.
1617. Donne, Serm., Wks. 1839, VI. 3. There are persons which are unrequitable, though they be believed to loue.
1646. Sir T. Browne, Pseud. Ep., V. xxi. 269. An unrequitable evil may ensue.
1683. Kennett, Erasm. on Folly, 17. An unrequitable obligation.
