Midras Ayub 14:8: Ein Yaakov (Glick Edition) & Bereshit Rabbah

(Fol. 71) I will walk before the Lord in the lands of the living (Ps. 116, 9). R, Juda said: "This refers to the market-places [where food is purchased]." (Prov. 3, 2) For length of days, and years of life, and peace, will they add for thee. Are there then years of life, and years not of life? R. Elazar said: "These refer to the years of man when his circumstances change from bad to good." (Ib. 8, 4:) Unto you, O men, I call. R. Brachiya said: "This refers to scholars, who are weak like women who sit in humbleness and perform feats as men do." R. Brachiya also said: "He who wishes to [be credited as though he would] bring a drink-offering on the altar, should let scholars drink [of his] wine." R. Brachiya said also: "When a man observes that learning ceases from his sons, he should marry a scholar's daughter, for it is said (Job 14, 8-9) If even its root (Ib. b) become old in the earth, and its stock die in the dust, yet through the scent of water will it flourish again, and produce boughs as though it were newly planted."

(Fol. 71) I will walk before the Lord in the lands of the living (Ps. 116, 9). R, Juda said: "This refers to the market-places [where food is purchased]." (Prov. 3, 2) For length of days, and years of life, and peace, will they add for thee. Are there then years of life, and years not of life? R. Elazar said: "These refer to the years of man when his circumstances change from bad to good." (Ib. 8, 4:) Unto you, O men, I call. R. Brachiya said: "This refers to scholars, who are weak like women who sit in humbleness and perform feats as men do." R. Brachiya also said: "He who wishes to [be credited as though he would] bring a drink-offering on the altar, should let scholars drink [of his] wine." R. Brachiya said also: "When a man observes that learning ceases from his sons, he should marry a scholar's daughter, for it is said (Job 14, 8-9) If even its root (Ib. b) become old in the earth, and its stock die in the dust, yet through the scent of water will it flourish again, and produce boughs as though it were newly planted."

“Planted in the House of the Lord, they blossom in the courts of our God. They will continue to yield fruit even in old age” (Psalms 92:14–15) – this refers to Abraham our patriarch. “They will remain full and fresh” (Psalms 92:15) – “Abraham took another [wife].”
“For the tree has hope” (Job 14:7) – Abraham our patriarch has hope. “If it is hewed [yikaret], it will yet regenerate” (Job 14:7) – if He will say to him: ‘Perform [kerot] the covenant [of circumcision],’ “it will yet regenerate” – [he constantly increased his performance of] mitzvot and good deeds. “And its roots will not cease” (Job 14:7) – this refers to his [Abraham’s] vitality.⁴After his circumcision he went on to produce a child, Isaac. “If its root grows old in the earth” (Job 14:8) – “Abraham was old” (Genesis 24:1). “And its trunk dies in the dirt” (Job 14:8) – “Sarah died”⁵And was buried in the earth. (Genesis 23:2). “It will blossom from the scent of water” (Job 14:9) – due the scent of mitzvot and good deeds, he will blossom.⁶Because of his virtuous behavior, he was enabled to father more children in his old age. “And produce branches” (Job 14:9) – “[branches] of a sapling” is not written here, but rather, “[branches] like a sapling” – the addition is greater than the tree itself: “Abraham took another [wife]…”⁷And through this new wife he produced even more offspring than he had previously.