Psalms 95:4

In his hand are the deep places of the earth: the strength of the hills is his also.

In his hand are the deep places of the earth - literally, the places which have to be searched; the hidden deeps, as contrasted with those that meet the eye (Job 38:16; Jeremiah 31:37).

The strength of the hills is his also - rather 'the heights of the hills.' The Hebrew [ tow`ªpowt (H8443), from yaa`ap (H3286), to pant with weariness] is a poetical expression for the heights which can be only reached by a toilsome ascent: in contrast to "the deep places of the earth." Or else the reference is to the wealth of the hills, obtained only by labour (Gesenius), corresponding to the former, "the deep places of the earth," explained as referring to the mines (Mendelssohn). Go where man may, with all his toil and searching in the heights or in the depths of the earth, he cannot find a place beyond the range of God's dominion.