The interpretation timeline
Psalm 127:6 Douay-Rheims

And mayest thou see thy children’s children, peace upon Israel.

A.D. 430 – 1849 3 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“For, "if in this life only," saith the Apostle, "we have hope in Christ, we are of all men most miserable." [1 Corinthians 15:19] For what reason were the Martyrs condemned to beasts? What is that good? Can it be declared? by what means, or what tongue can tell it? or what ears can hear it? That indeed, "Neither ear hath heard, nor hath it entered into man's heart:" [1 Corinthians 2:9] only let us love, only let us grow in grace: ye see, then, that battles are not wanting, and that we fight with our lusts. We fight outwardly with unbelieving and disobedient men; we fight inwardly with carnal suggestions and perturbations: we everywhere as yet fight. ...What sort of peace then is this? One from Jerusalem, for Jerusalem is interpreted, A vision of Peace. Thus then "mayest thou see the good things that are of Jerusalem," and that, "all thy life long-and mayest thou see," not only thy children, but, "thy children's children." What meaneth, Thy children? Thy works which thou here dost. Who are thy children's children? The fruits of thy works. Thou givest alms: these are thy children: for the sake of thine alms thou receivest everlasting life, these are thy children's children. "Mayest thou see thy children's children;" and there shall be "peace upon Israel" [Psalm 128:6], the last words of the Psalm....”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“And may you see children [born] to your children and they shall not come to quarrel about halitzah, [since that is performed only if there are no children,] and then there will be peace upon Israel (addendum). children [born] to your children They will inherit the estate, and no woman will be subject to the levir [in a levirate marriage]. Then there will be peace in the world.”
Source

Post-Reformation

c. 1650 – 1900
1849
A.D.
1774–1849
“Israel. This is best secured by a well-regulated and numerous people. (Berthier) — The good works, performed on earth, will be rewarded in heaven. (Worthington) — We shall rejoice in the spiritual children, whom we shall have begotten. (Menochius) Bible Text & Cross-references: The fear of God is the way to happiness. 1 A gradual canticle. Blessed are all they that fear the Lord; that walk in his ways. 2 For thou shalt eat the labours of thy hands: blessed art thou, and it shall be well with thee. 3 Thy wife as a fruitful vine, on the sides of thy house. Thy children as olive plants round about thy table. 4 Behold, thus shall the man be blessed that feareth the Lord. 5 May the Lord bless thee out of Sion: and mayst thou see the good things of Jerusalem all the days of thy life. 6 And mayst thou see thy children’s children, peace upon Israel. Table of Psalms 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque finibus commodo nibh, ut elementum velit sollicitudin at. Donec suscipit commodo risus. Nunc vel orci eget ligula elementum consequat. Fusce velit erat, convallis scelerisque aliquet ut, facilisis egestas tellus. Quisque sit amet sapien placerat, ultricies sapien ut, vestibulum ex.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.