Job 11:13

“If thou prepare thine heart, and stretch out thine hands towards him.] In this and the following verses Zophar proceeds to give some advice to Job; which, if taken, would issue in his future happiness, but otherwise it would be ill with him; he advises him to pray to God with an heart prepared for such service; so some render the last clause in the imperative, “stretch out thine hands f498 towards him”; that is, towards God; for, though not expressed, is implied, whose immensity, sovereignty, and omniscience, Zophar had been discoursing of; and, though stretching out the hands is sometimes a gesture of persons in distress and mournful circumstances, thereby signifying their grief and sorrow,…”

“The apodosis to the "If" is at Job 11:15. The preparation of the heart is to be obtained (Pro 16:1) by stretching out the hands in prayer for it (Psa 10:17; Ch1 29:18).”

“If thou prepare thine heart - Zophar now proceeds to state that if Job even yet would return to God, he might hope for acceptance. Though he had sinned, and though he was now, as he supposed, a hollow-hearted and an insincere man, yet, if he would repent, he might expect the divine favor. In this he accords with the sentiment of Eliphaz, and he concludes his speech in a manner not a little resembling his; see Job 5:17-27. And stretch out thine hands toward him - In the attitude of supplication. To stretch out or spread forth the hands, is a phrase often used to denote the act of supplication; see 1 Timothy 2:8, and the notes of Wetstein on that place. Horace, 3 Carm. xxiii. 1, Coelo supinas…”

“Heart - To seek God; turning thy bold contentions with God into humble supplications. Job 11:15”

“11:13-14 Zophar laid out three conditions for restoration (11:15): (1) prepare your heart, in an inward act that is not just a ritual; (2) lift up your hands, a symbolic gesture of prayer, appeal (Exod 9:29; Prov 1:24; Isa 1:15), or surrender; (3) leave all iniquity, not by sacrifice and remorse, but by quitting the sin (cp. Heb 11:6; Jas 4:8; 5:16).”

“prepare: Job 5:8, Job 8:5, Job 8:6, Job 22:21, Job 22:22; Sa1 7:3; Ch2 12:14, Ch2 19:3; Psa 78:8; Luk 12:47 stretch: Psa 68:31, Psa 88:9, Psa 143:6 Job 11:14”

“13 But if thou wilt direct thy heart, And spread out thy hands to Him - 14 If there is evil in thy hand, put it far away, And let not wickedness dwell in thy tents - 15 Then indeed canst thou lift up thy face without spot, And shalt be firm without fearing. The phrase הכין לב signifies neither to raise the heart (Ewald), nor to establish it (Hirz.), but to direct it, i.e., give it the right direction ( Psa 78:8) towards God, Sa1 7:3; Ch2 20:33; it has an independent meaning, so that there is no need to supply אל־אל, nor take וּפרשׂתּ to be for לפרושׂ (after the construction in Ch2 30:19). To spread out the hands in prayer is כּפּים (פּרשׂ) פּרשׂ; ידים is seldom used instead of the more…”