Securely - i. e., "With full trust," without care or suspicion. Compare Judges 18:7, Judges 18:27.

Devise not evil against thy neighbour, seeing he dwelleth (n) securely by thee.
(n) That is, puts his trust in you.

Devise not evil against thy neighbour,.... Or, "plough not evil" (i); turn not up thy heart to find evil against thy neighbour, as the earth is turned up by the plough; see Hosea 10:13. Do not contrive and form schemes in thy mind and thoughts to do him any injury, in his name and character, in his person, property, or family: a good man should devise all the good he can to his fellow creatures, but not evil to any; especially to his neighbour, and as described in the next clause;
seeing he dwelleth securely by thee; having a good opinion of thee, and not suspecting any ill design against him, thinks himself, goods, and family, in safety; and is under no concern to provide for his security, placing his confidence in thee, and perhaps to such a degree as to entrust with his secrets. Now to project evil against such a man is exceeding base; it is doubly sinful; this is an aggravation of the iniquity.
(i) "ne ares", Amama.

Do not abuse confidence and avoid litigation.

A second illustration of neighbourly love is harmlessness:
Devise not evil against thy neighbour,
While he dwelleth securely by thee.
The verb חרשׁ, χαράσσειν, signifies to cut into, and is used of the faber ferrarius as well as of the τιγναριυς (Isaiah, p. 463), who with a cutting instrument (חרשׁ, Genesis 4:22) works with metal or wood, and from his profession is called חרשׁ. But the word means as commonly to plough, i.e., to cut with the plough, and חרשׁ is used also of a ploughman, and, without any addition to it, it always has this meaning. It is then a question whether the metaphorical phrase רעה חרשׁ signifies to fabricate evil, cf. dolorum faber, mendacia procudere, ψευδῶν καὶ ἀπατῶν τέκτων, and the Homeric κακὰ φρεὶ βυσσοδομεύειν (Fleischer and most others), or to plough evil (Rashi, Ewald, etc.). The Targ., Syriac, and Jerome translate חשׁב, without deciding the point, by moliri; but the lxx and Graecus Venet. by τεκταίνειν. The correctness of these renderings is not supported by Ezek. 21:36, where חרשׁי משׁחית are not such as fabricate destruction, but smiths who cause destruction; also מחרישׁ, 1-Samuel 23:9, proves nothing, and probably does not at all appertain to חרשׁ incidere (Keil), but to חרשׁ silere, in the sense of dolose moliri. On the one hand, it is to be observed from Job 4:8; Hosea 10:13, cf. Psalm 129:3, that the meaning arare malum might connect itself with חרשׁ רעה; and the proverb of Sirach 7:12, μὴ ἀροτρία ψεῦδος ἐπ ̓ ἀδελφῷ σου, places this beyond a doubt. Therefore in this phrase, if one keeps before him a clear perception of the figure, at one time the idea of fabricating, at another that of ploughing, is presented before us. The usage of the language in the case before us is more in favour of the latter than of the former. Whether ישׁב את means to dwell together with, or as Bttcher, to sit together with, after Psalm 1:1; Psalm 26:4., need not be a matter of dispute. It means in general a continued being together, whether as sitting, Job 2:13, or as dwelling, Judges 17:11.
(Note: Accentuate והוא־יושׁב לבטח. It is thus in correct texts. The Rebia Mugrash is transformed, according to the Accentuationssystem, xviii. 2.)
To take advantage of the regardlessness of him who imparts to us his confidence is unamiable. Love is doubly owing to him who resigns himself to it because he believes in it.

Securely - Relying upon thine integrity.