Albert Barnes Commentary Psalms 103:7

"He made known his ways unto Moses, His doings unto the children of Israel." — Psalms 103:7 (ASV)

He made known his ways to Moses - This is another ground of praise: God had “revealed his will.” This was done in an indubitable manner to Moses, and these revelations were recorded by him for the instruction and guidance of his people.

The word “ways” here means his laws; his methods of administration; the principles on which he governs mankind; and the conditions on which he will save people. There is no higher ground of gratitude to God than the fact that he has given a revelation to mankind.

His acts to the children of Israel - His methods of doing things have been made known to them; and his acts—his interpositions—have been in their favor.