Kural - 789

And where is friendship's royal seat? In stable mind,
Where friend in every time of need support may find

Explanation
Friendship may be said to be on its throne when it possesses the power of supporting one at all times and under all circumstances, (in the practice or virtue and wealth).

Tamil Transliteration
Natpirku Veetrirukkai Yaadhenin Kotpindri
Ollumvaai Oondrum Nilai.