David
Psalm 86:13BSB·traditional attribution

For great is Your loving devotion to me; You have delivered me from the depths of Sheol.

John Calvin Reformed @genevareformer

PSALM 86 In this psalm prayers and holy meditations, engaged in with the view of nourishing and confirming faith, together with praises and thanksgivings, are intermingled. It having been difficult in the judgement of carnal reason for David to escape from the distresses with which he was environed, he sets in opposition to its conclusions the infinite goodness and power of God.

Commenting on Psalm 86:1-17

C.H. Spurgeon Reformed Baptist @princeofpreachers

For great is thy mercy toward me. Personal experience is ever the master singer. Whatever thou art to others, to me thy mercy is most notable. The psalmist claims to sing among the loudest, because his debt to divine mercy is among the greatest. And thou hast delivered my soul from the lowest hell.

Matthew Henry Presbyterian @wholebiblehenry

David is here going on in his prayer. I. He gives glory to God; for we ought in our prayers to praise him, ascribing kingdom, power, and glory, to him, with the most humble and reverent adorations. 1. As a being of unparalleled perfection, such a one that there is none like him nor any to be compared with him, Psa 86:8.

Commenting on Psalm 86:8-17