Musar zu Jeschijahu 54:10

May the L-rd strengthen our hearts to emulate His chesed so that the greatness of His lovingkindness not depart from us. As Chazal have said (Vayikra Rabbah 36): "If you see the merit of the fathers and the merit of the mothers 'tottering,' cleave to gemiluth chasadim, as it is written (Isaiah 54:10): 'For the mountains will depart and the hills will totter, but My chesed shall not depart from you'" — this is gemiluth chasadim. (Ibid.) 'And the covenant of My peace shall not totter' — this is [i.e., refers to] one who makes peace between a man and his wife and between a man and his neighbor." For this, too, is gemiluth chasadim. And may there be fulfilled in us (Ibid. 14): "With tzedakah will you be established, etc."