The interpretation timeline
Psalm 144:21 Douay-Rheims

My mouth shall speak the praise of the Lord: and let all flesh bless thy holy name for ever; yea, for ever and ever.

A.D. 430 – 1871 6 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Since this is so, and we have heard the blessing of the Lord, the works of the Lord, the wondrous things of the Lord, the mercies of the Lord, the severity of the Lord, His Providence over all His works, the confession of all His works; observe how He concludeth in His praise, "My mouth shall speak the praise of the Lord, and let all flesh bless His holy Name for ever and ever" (ver. 21).”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“My mouth will speak the praise of the Lord and also all flesh will bless His holy name forever and ever.”
1235
A.D.
Radak Jewish
c. 1160–1235
“My mouth shall speak the praise of the Lord (תהלת ה' ידבר פי): When I come to life with the dead, then my mouth shall speak the praise of the Lord, and then all flesh will bless His holy name. My intention is to say that all humans alone and not the other lower animals, so she was the mother of all life, speaking.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“My mouth shall speak the praise of the Lord,.... Always, at all times, as long as he lived; and particularly when all the Lord's people shall be brought safe to glory, and the wicked destroyed; when, as Kimchi observes, he should live again with the dead that shall be raised; and let all flesh bless his holy name for ever and ever; not every animal, or irrational creature; not carnal men, but spiritual men; such as are praying ones, that come to a God hearing prayer: these should be praising ones; such who have hearts of flesh given them, and are sensible of divine favours, as well as of their sinfulness and unworthiness; Jews and Gentiles, all sorts of men called by grace, all flesh on whom the Spirit of God is poured; these are all excited to praise and bless the holy name of the Redeemer, with the words and by the example of the psalmist. And thus the psalm ends as it begun, with praise and blessing. Next: Psalms Chapter 146”
Source
1849
A.D.
1774–1849
“Flesh. Every human being, though even the least favoured, must praise God, as all have received much from him. (Haydock) Bible Text & Cross-references: A psalm of praise, to the infinite majesty of God. 1 Praise, for David himself. I will extol thee, O God, my king: and I will bless thy name for ever; yea, for ever and ever. 2 Every day I will bless thee: and I will praise thy name for ever; yea, for ever and ever. 3 Great is the Lord, and greatly to be praised: and of his greatness there is no end. 4 Generation and generation shall praise thy works: and they shall declare thy power. 5 They shall speak of the magnificence of the glory of thy holiness: and shall tell thy wondrous works. 6 And they shall speak of the might of thy terrible acts: and shall declare thy greatness. 7 They shall publish the memory of the abundance of thy sweetness: and shall rejoice in thy justice. 8 The Lord is gracious and merciful: patient and plenteous in mercy. 9 The Lord is sweet to all: and his tender mercies are over all his works. 10 Let all thy works, O Lord, praise thee: and let thy saints bless thee. 11 They shall speak of the glory of thy kingdom: and shall tell of thy power: 12 To make thy might known to the sons of men: and the glory of the magnificence of thy kingdom. 13 Thy kingdom is a kingdom of all ages: and thy dominion endureth throughout all generations. The Lord is faithful in all his words: and holy in all his works. 14 The Lord lifteth up all that fall: and setteth up all that are cast down. 15 The eyes of all hope in thee, O Lord: and thou givest them meat in due season. 16 Thou openest thy hand, and fillest with blessing every living creature. 17 The Lord is just in all his ways: and holy in all his works. 18 The Lord is nigh unto all them that call upon him: to all that call upon him in truth. 19 He will do the will of them that fear him: and he will hear their prayer, and save them. 20 The Lord keepeth all them that love him: but all the wicked he will destroy. 21 My mouth shall speak the praise of the Lord: and let all flesh bless thy holy name for ever; yea, for ever and ever. 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
1871
A.D.
1871
“(Compare Psa 33:21). all flesh-- (Psa 65:2). The Psalm ends, as it began, with ascriptions of praise, in which the pious will ever delight to join. Next: Psalms Chapter 147”
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.