Midrash su Salmi 68:21

For this shall every pious one pray unto Thee at the time when Thou mayest be found (Ps. 32, 6). R. Chanina said: "L-eth Metzo, (At the time when thou mayest be found) alludes [to the time when one is about to take a] wife, as it is written (Pr. 18, 22.) Whoso hath found a wife hath found happiness." In Palestine, when a man married he was asked Matzah (found), or Motzei (find). Matzah, as it is written (Pr. 18, 22.) Whoso hath found (Matza) a wife hath found happiness; Motzei, as it is written (Ecc. 7, 26.) And I find (Motzei) the woman more bitter than death. R. Nathan said: "L-eth Metzo, refers to the Torah, as it is written (Pr. 8, 35.) For he who findeth me (the Torah), findeth life." R. Nachman b. Isaac said: "L-eth Metzo, means [the time of] death, as it is written (Ps. 68, 21.)The escape from death." We have also a Baraitha to the same effect: There are nine hundred and three kinds of deaths in the world, as it is said (Ib.) The escape from death (Totzaoth). The numerical value of the word Totzaoth, amounts to nine hundred and three; the hardest of all deaths is croup, and the easiest of all is the divine kiss; croup is like a thorn in a ball of wool, which [if one tries to tear loose] lacerates backward (in the opposite direction of the knots); others say as the gushing water at the entrance of a canal [when the sluice bars are raised]; the kiss referred to is like the extraction of a hair from milk. R. Jochanan said: "L-eth Metzo, refers to the grave." R. Chanina said: "Where is the Biblical passage to prove it? (Job 3, 22.) Who would rejoice, even to exulting, who would he glad could they but find a grave." Rabba b. R. Shila said: "Thus it is that people say: 'Man ought to pray for peace even to the last clod of earth thrown on his grave.' " Mar Zutra said: "L-eth Metzo, refers to the necessity of living in a place where there are sanitary conditions." The sages of Palestine [upon hearing all the opinions in explaining the above passage] remarked that Mar Zutra's opinion is the best of all.

Another comment on In a time when Thou mayest be found. This refers to the time of death. R. Ishmael said: There are nine hundred and three different kinds of death, as it is said: And unto God the Lord belong the issues of death (Ps. 68:21). By Gematria the letters in the word totza’ah (“issue”) total nine hundred and three mathematically. The most painful death of all is to be choked, the most pleasant is the divine kiss of death.