Valmiki Ramayana Sundara Kanda Sarga 1 Shloka 198
Original Shlokaयस्य त्वेतानि चत्वारि वानरेन्द्र यथा तव।।5.1.198।। धृतिर्दृष्टिर्मतिर्दाक्ष्यं सः कर्मसु न सीदति।
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वानरेन्द्र O lord of vanara, यस्य in whom, धृतिः fortitude, दृष्टिः vision, मतिः intelligence, दाक्ष्यम् dexterity, एतानि these, चत्वारि four, तव यथा as in you, स: he, कर्मसु in missions, न सीदति will not get lost.
"O lord of vanaras he in whom these four qualities, fortitude, vision, intelligence and dexterity exist as in you will achieve his mission and not get lost".